/* ===== CSS VARIABLES ===== */
:root {
    /* Color System - 7:3:1 Ratio */
    --color-dominant: #F7F7F7;
    /* Off-White - 70% usage */
    --color-secondary: #1C2833;
    /* Deep Charcoal - 30% usage */
    --color-accent: #D62727;
    /* IMS Red - 1% usage */

    /* Additional Colors */
    --color-white: #FFFFFF;
    --color-overlay: rgba(28, 40, 51, 0.8);
    --color-light-gray: #E8E8E8;
    --color-medium-gray: #666666;

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Font Weights */
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-black: 900;

    /* Font Sizes - Desktop */
    --fs-h1: 3rem;
    /* 48px */
    --fs-h2: 2.25rem;
    /* 36px */
    --fs-h3: 1.5rem;
    /* 24px */
    --fs-body: 1rem;
    /* 16px */
    --fs-small: 0.875rem;
    /* 14px */

    /* Line Heights */
    --lh-heading: 1.2;
    --lh-body: 1.6;

    /* Spacing System - 8px base */
    --space-xs: 0.5rem;
    /* 8px */
    --space-sm: 1rem;
    /* 16px */
    --space-md: 1.5rem;
    /* 24px */
    --space-lg: 2rem;
    /* 32px */
    --space-xl: 3rem;
    /* 48px */
    --space-2xl: 5rem;
    /* 80px */

    /* Container */
    --container-max-width: 1200px;
    --container-padding: 1rem;

    /* Breakpoints */
    --bp-mobile: 768px;
    --bp-tablet: 1024px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-light: 0 2px 8px rgba(28, 40, 51, 0.1);
    --shadow-medium: 0 4px 16px rgba(28, 40, 51, 0.15);
    --shadow-heavy: 0 8px 32px rgba(28, 40, 51, 0.2);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* ===== CSS RESET ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-body);
    font-weight: var(--fw-regular);
    line-height: var(--lh-body);
    color: var(--color-secondary);
    background-color: var(--color-dominant);
    overflow-x: hidden;
}

/* Remove default list styles */
ul,
ol {
    list-style: none;
}

/* Remove default link styles */
a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--color-accent);
}

/* Image defaults */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Form elements */
input,
textarea,
button,
select {
    font-family: inherit;
    font-size: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--space-2xl) 0;
}

.accent {
    color: var(--color-accent);
}

.text-center {
    text-align: center;
}

.text-white {
    color: var(--color-white);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== RESPONSIVE BREAKPOINTS ===== */
@media (max-width: 768px) {
    :root {
        --fs-h1: 2rem;
        /* 32px */
        --fs-h2: 1.5rem;
        /* 24px */
        --fs-h3: 1.25rem;
        /* 20px */
        --space-2xl: 2.5rem;
        /* 40px */
        --container-padding: 1rem;
    }

    .section {
        padding: var(--space-2xl) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 0.75rem;
    }
}

/* ===== TYPOGRAPHY SYSTEM ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    line-height: var(--lh-heading);
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
}

h1 {
    font-size: var(--fs-h1);
    font-weight: var(--fw-black);
}

h2 {
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
}

h3 {
    font-size: var(--fs-h3);
    font-weight: var(--fw-semibold);
}

p {
    margin-bottom: var(--space-sm);
    color: var(--color-secondary);
}

.section__title {
    font-family: var(--font-heading);
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
    text-align: center;
    margin-bottom: var(--space-xl);
    color: var(--color-secondary);
}

.section__title--white {
    color: var(--color-white);
}

/* ===== BUTTON SYSTEM ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    font-weight: var(--fw-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 48px;
}

.btn--primary {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn--primary:hover {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn--secondary:hover {
    background-color: var(--color-secondary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn--full {
    width: 100%;
}

/* ===== SPACING UTILITIES ===== */
.mb-xs {
    margin-bottom: var(--space-xs);
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mb-xl {
    margin-bottom: var(--space-xl);
}

.mb-2xl {
    margin-bottom: var(--space-2xl);
}

.mt-xs {
    margin-top: var(--space-xs);
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mt-xl {
    margin-top: var(--space-xl);
}

.mt-2xl {
    margin-top: var(--space-2xl);
}

.p-xs {
    padding: var(--space-xs);
}

.p-sm {
    padding: var(--space-sm);
}

.p-md {
    padding: var(--space-md);
}

.p-lg {
    padding: var(--space-lg);
}

.p-xl {
    padding: var(--space-xl);
}

.p-2xl {
    padding: var(--space-2xl);
}

.px-xs {
    padding-left: var(--space-xs);
    padding-right: var(--space-xs);
}

.px-sm {
    padding-left: var(--space-sm);
    padding-right: var(--space-sm);
}

.px-md {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

.px-lg {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

.px-xl {
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
}

.py-xs {
    padding-top: var(--space-xs);
    padding-bottom: var(--space-xs);
}

.py-sm {
    padding-top: var(--space-sm);
    padding-bottom: var(--space-sm);
}

.py-md {
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
}

.py-lg {
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
}

.py-xl {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
}

/* ===== GRID UTILITIES ===== */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid--5 {
    grid-template-columns: repeat(5, 1fr);
}

/* Responsive grid adjustments */
@media (max-width: 768px) {

    .grid--4,
    .grid--5 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {

    .grid--2,
    .grid--3,
    .grid--4,
    .grid--5 {
        grid-template-columns: 1fr;
    }
}

/* ===== FLEX UTILITIES ===== */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-column {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-xs {
    gap: var(--space-xs);
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.gap-lg {
    gap: var(--space-lg);
}

.gap-xl {
    gap: var(--space-xl);
}

/* ===== RESPONSIVE TYPOGRAPHY ===== */
@media (max-width: 768px) {
    h1 {
        font-size: var(--fs-h1);
    }

    h2 {
        font-size: var(--fs-h2);
    }

    h3 {
        font-size: var(--fs-h3);
    }

    .section__title {
        font-size: var(--fs-h2);
        margin-bottom: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--fs-small);
    }
}

/* ====
= HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-dominant);
    box-shadow: var(--shadow-light);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    min-height: 70px;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav__logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav__title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: var(--fw-bold);
    color: var(--color-secondary);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav__link {
    font-family: var(--font-body);
    font-size: var(--fs-body);
    font-weight: var(--fw-medium);
    color: var(--color-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    position: relative;
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-accent);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav__toggle-line {
    width: 25px;
    height: 3px;
    background-color: var(--color-secondary);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--color-dominant);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--space-xl) 0;
        gap: var(--space-lg);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-medium);
    }

    .nav__menu.show {
        left: 0;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__toggle.active .nav__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .nav__toggle.active .nav__toggle-line:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle.active .nav__toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    .nav__link {
        font-size: 1.125rem;
        padding: var(--space-sm) var(--space-lg);
    }
}

/* Header scroll effect */
.header.scrolled {
    background-color: var(--color-secondary);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-medium);
}

/* Ensure nav elements are white on dark background when scrolled */
.header.scrolled .nav__link {
    color: var(--color-white);
}

.header.scrolled .nav__link:hover,
.header.scrolled .nav__link.active {
    color: var(--color-accent);
}

.header.scrolled .nav__toggle-line {
    background-color: var(--color-white);
}

.header.scrolled .nav__title {
    color: var(--color-white);
}

.header.scrolled .nav__logo {
    filter: brightness(0) invert(1);
    transition: filter var(--transition-normal);
}

/* Ensure mobile menu is also properly styled when header is scrolled */
.header.scrolled .nav__menu {
    background-color: var(--color-secondary);
}

.header.scrolled .nav__menu .nav__link {
    color: var(--color-white);
}

/* Offset for fixed header */
body {
    padding-top: 70px;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-dominant) 0%, #EEEEEE 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?w=800&h=600&fit=crop') center/cover;
    opacity: 0.1;
    z-index: 1;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero__content {
    max-width: 600px;
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--fw-black);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-secondary);
}

.hero__subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--space-md);
    color: var(--color-secondary);
}

.hero__description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    color: var(--color-medium-gray);
    max-width: 500px;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero__image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__img {
    width: 100%;
    max-width: 500px;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-heavy);
    position: relative;
    z-index: 2;
}

.hero__img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    border-radius: var(--radius-lg);
    z-index: 1;
}

/* Hero decorative elements */
.hero__image::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: var(--color-accent);
    opacity: 0.1;
    border-radius: 50%;
    z-index: 1;
}

.hero__image::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: -30px;
    width: 150px;
    height: 150px;
    background: var(--color-secondary);
    opacity: 0.05;
    border-radius: 50%;
    z-index: 1;
}

/* Responsive Hero */
@media (max-width: 768px) {
    .hero {
        min-height: 80vh;
        padding: var(--space-xl) 0;
    }

    .hero__container {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }

    .hero__content {
        order: 2;
        max-width: 100%;
    }

    .hero__image {
        order: 1;
    }

    .hero__img {
        height: 300px;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero::before {
        width: 100%;
        height: 40%;
        top: 0;
        opacity: 0.05;
    }
}

@media (max-width: 480px) {
    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .hero__actions .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* ==
=== ADVANTAGE SECTION ===== */
.advantage {
    background-color: var(--color-white);
    position: relative;
}

.advantage::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
}

.advantage__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.advantage__card {
    background: var(--color-dominant);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-light-gray);
    position: relative;
    overflow: hidden;
}

.advantage__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 4px;
    background: var(--color-accent);
    transition: left var(--transition-slow);
}

.advantage__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.advantage__card:hover::before {
    left: 0;
}

.advantage__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border-radius: 50%;
    color: var(--color-secondary);
    box-shadow: var(--shadow-light);
}

.advantage__icon svg {
    width: 32px;
    height: 32px;
    stroke-width: 1.5;
}

.advantage__title {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-sm);
    color: var(--color-secondary);
}

.advantage__description {
    color: var(--color-medium-gray);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Responsive Advantage */
@media (max-width: 768px) {
    .advantage__grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--space-lg);
    }

    .advantage__card {
        padding: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .advantage__grid {
        grid-template-columns: 1fr;
    }
}

/* 
===== SOLUTIONS SECTION ===== */
.solutions {
    background-color: var(--color-dominant);
}

.solutions__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.solution__card {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.solution__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(214, 39, 39, 0.05) 50%, transparent 100%);
    transition: left var(--transition-slow);
}

.solution__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--color-accent);
}

.solution__card:hover::before {
    left: 0;
}

.solution__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dominant);
    border-radius: 50%;
    color: var(--color-secondary);
    transition: all var(--transition-normal);
}

.solution__card:hover .solution__icon {
    background: var(--color-accent);
    color: var(--color-white);
    transform: scale(1.1);
}

.solution__icon svg {
    width: 40px;
    height: 40px;
    stroke-width: 1.5;
}

.solution__title {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-sm);
    color: var(--color-secondary);
}

.solution__description {
    color: var(--color-medium-gray);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.solution__brands {
    font-size: var(--fs-small);
    color: var(--color-accent);
    font-weight: var(--fw-medium);
    margin-bottom: var(--space-md);
}

.solution__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-secondary);
    font-weight: var(--fw-medium);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.solution__link::after {
    content: '→';
    transition: transform var(--transition-normal);
}

.solution__link:hover {
    color: var(--color-accent);
}

.solution__link:hover::after {
    transform: translateX(4px);
}

/* Responsive Solutions */
@media (max-width: 768px) {
    .solutions__grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-lg);
    }

    .solution__card {
        padding: var(--space-lg);
    }

    .solution__icon {
        width: 70px;
        height: 70px;
    }

    .solution__icon svg {
        width: 35px;
        height: 35px;
    }
}

@media (max-width: 480px) {
    .solutions__grid {
        grid-template-columns: 1fr;
    }
}

/* ===== SOLUTION DETAIL SECTIONS ===== */
.solution-detail {
    background-color: var(--color-white);
}

.solution-detail:nth-child(even) {
    background-color: var(--color-dominant);
}

.solution-detail__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.solution-detail--reverse .solution-detail__content {
    direction: rtl;
}

.solution-detail--reverse .solution-detail__text {
    direction: ltr;
}

.solution-detail__title {
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-md);
    color: var(--color-secondary);
}

.solution-detail__description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-medium-gray);
    margin-bottom: var(--space-lg);
}

.solution-detail__features {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.solution-detail__features li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-secondary);
    line-height: 1.6;
}

.solution-detail__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-accent);
    font-weight: var(--fw-bold);
    font-size: 1.125rem;
}

.solution-detail__brands h4 {
    font-size: var(--fs-body);
    font-weight: var(--fw-semibold);
    color: var(--color-secondary);
    margin-bottom: var(--space-xs);
}

.solution-detail__brands p {
    color: var(--color-accent);
    font-weight: var(--fw-medium);
    margin-bottom: 0;
}

.solution-detail__image {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.solution-detail__img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.solution-detail__image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    z-index: 1;
    transition: opacity var(--transition-normal);
}

.solution-detail__image:hover::before {
    opacity: 0.6;
}

.solution-detail__image:hover .solution-detail__img {
    transform: scale(1.05);
}

/* Responsive Solution Details */
@media (max-width: 768px) {
    .solution-detail__content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .solution-detail--reverse .solution-detail__content {
        direction: ltr;
    }

    .solution-detail__text {
        order: 2;
    }

    .solution-detail__image {
        order: 1;
    }

    .solution-detail--reverse .solution-detail__text {
        order: 2;
    }

    .solution-detail--reverse .solution-detail__image {
        order: 1;
    }

    .solution-detail__img {
        height: 300px;
    }

    .solution-detail__title {
        font-size: var(--fs-h2);
    }

    .solution-detail__description {
        font-size: var(--fs-body);
    }
}

/* ===== PA
RTNERS SECTION ===== */
.partners {
    background-color: var(--color-dominant);
}

.partners__subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-medium-gray);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.partners__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-xl);
    align-items: center;
}

.partner__item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background: var(--color-white);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-light-gray);
    min-height: 160px;
}

.partner__item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-accent);
}

.partner__logo {
    max-width: 100%;
    max-height: 80px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(100%) contrast(1.2);
    transition: all var(--transition-normal);
    opacity: 1 !important;
    display: block;
}

/* Ensure partner logos are visible even if image fails to load */
.partner__logo::before {
    content: attr(alt);
    display: block;
    text-align: center;
    font-size: var(--fs-small);
    color: var(--color-medium-gray);
    padding: var(--space-sm);
    background: var(--color-light-gray);
    border-radius: var(--radius-sm);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.partner__logo:not([src]),
.partner__logo[src=""],
.partner__logo[src*="error"] {
    opacity: 0;
}

.partner__logo:not([src])::before,
.partner__logo[src=""]::before,
.partner__logo[src*="error"]::before {
    opacity: 1;
}

.partner__item:hover .partner__logo {
    filter: grayscale(0%) contrast(1);
    transform: scale(1.05);
}

/* Responsive Partners */
@media (max-width: 768px) {
    .partners__grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: var(--space-lg);
    }

    .partner__item {
        padding: var(--space-lg);
        min-height: 130px;
    }

    .partner__logo {
        max-height: 70px;
    }
}

@media (max-width: 480px) {
    .partners__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 
SECTORS SECTION ===== */
.sectors {
    background-color: var(--color-white);
}

.sectors__subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-medium-gray);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.sectors__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.sector__card {
    background: var(--color-dominant);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-light-gray);
    position: relative;
}

.sector__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.sector__image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.sector__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.sector__image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    z-index: 1;
    transition: opacity var(--transition-normal);
}

.sector__card:hover .sector__img {
    transform: scale(1.1);
}

.sector__card:hover .sector__image::before {
    opacity: 0.6;
}

.sector__content {
    padding: var(--space-lg);
}

.sector__title {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-sm);
    color: var(--color-secondary);
    transition: color var(--transition-normal);
}

.sector__card:hover .sector__title {
    color: var(--color-accent);
}

.sector__description {
    color: var(--color-medium-gray);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Responsive Sectors */
@media (max-width: 768px) {
    .sectors__grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-lg);
    }

    .sector__image {
        height: 180px;
    }

    .sector__content {
        padding: var(--space-md);
    }
}

@media (max-width: 480px) {
    .sectors__grid {
        grid-template-columns: 1fr;
    }

    .sector__image {
        height: 200px;
    }
}

/* ====
= ABOUT SECTION ===== */
.about {
    background-color: var(--color-dominant);
}

.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.about__panel {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    position: relative;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-light-gray);
}

.about__panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-accent);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.about__panel:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.about__panel--vision::before {
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-secondary) 100%);
}

.about__panel--mission::before {
    background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-accent) 100%);
}

.about__panel-title {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-md);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.about__panel-title::before {
    content: '';
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-dominant);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.about__panel--vision .about__panel-title::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23D62727' stroke-width='2'%3E%3Cpath d='M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z'/%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

.about__panel--mission .about__panel-title::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23D62727' stroke-width='2'%3E%3Cpath d='M12 2l3.09 6.26L22 9.27l-5 4.87 1.18 6.88L12 17.77l-6.18 3.25L7 14.14 2 9.27l6.91-1.01L12 2z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

.about__panel-text {
    color: var(--color-medium-gray);
    line-height: 1.7;
    font-size: 1.125rem;
    margin-bottom: 0;
}

/* Responsive About */
@media (max-width: 768px) {
    .about__content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .about__panel {
        padding: var(--space-lg);
    }

    .about__panel-text {
        font-size: var(--fs-body);
    }
}

/* ===== 
CONTACT SECTION ===== */
.contact {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.contact__info {
    padding-right: var(--space-lg);
}

.contact__subtitle {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-lg);
    color: var(--color-white);
}

.contact__item {
    margin-bottom: var(--space-lg);
}

.contact__item h4 {
    font-size: 1.125rem;
    font-weight: var(--fw-semibold);
    margin-bottom: var(--space-sm);
    color: var(--color-accent);
}

.contact__item p {
    color: var(--color-white);
    margin-bottom: var(--space-xs);
    line-height: 1.6;
}

.contact__item a {
    color: var(--color-white);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.contact__item a:hover {
    color: var(--color-accent);
}

.contact__links ul {
    list-style: none;
}

.contact__links li {
    margin-bottom: var(--space-xs);
}

.contact__links a {
    color: var(--color-white);
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.contact__links a:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.contact__links a::before {
    content: '→';
    font-size: 0.875rem;
}

/* ===== CONTACT FORM ===== */
.contact__form-container {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form__label {
    font-weight: var(--fw-medium);
    color: var(--color-white);
    font-size: var(--fs-small);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form__input,
.form__textarea {
    padding: var(--space-sm) var(--space-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    font-size: var(--fs-body);
    transition: all var(--transition-normal);
    backdrop-filter: blur(5px);
}

.form__input::placeholder,
.form__textarea::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(214, 39, 39, 0.2);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

/* Form validation styles */
.form__input:invalid,
.form__textarea:invalid {
    border-color: rgba(255, 100, 100, 0.6);
}

.form__input:valid,
.form__textarea:valid {
    border-color: rgba(100, 255, 100, 0.6);
}

/* Form submission states */
.form__message {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: var(--fw-medium);
    text-align: center;
    display: none;
}

.form__message--success {
    background: rgba(100, 255, 100, 0.2);
    border: 1px solid rgba(100, 255, 100, 0.4);
    color: #90EE90;
}

.form__message--error {
    background: rgba(255, 100, 100, 0.2);
    border: 1px solid rgba(255, 100, 100, 0.4);
    color: #FFB3B3;
}

.form__message--loading {
    background: rgba(214, 39, 39, 0.2);
    border: 1px solid rgba(214, 39, 39, 0.4);
    color: var(--color-accent);
}

/* Responsive Contact */
@media (max-width: 768px) {
    .contact__content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .contact__info {
        padding-right: 0;
    }

    .contact__form-container {
        padding: var(--space-lg);
    }

    .contact__form {
        gap: var(--space-md);
    }
}

/* ===== SCROLL TO TOP BUTTON ===== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: var(--fw-bold);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-medium);
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* ===== IMAGE OPTIMIZATION ===== */
img {
    opacity: 0;
    transition: opacity var(--transition-slow);
}

img.loaded {
    opacity: 1;
}

/* Partner logos should be visible immediately */
.partner__logo {
    opacity: 1 !important;
}

/* Fallback: Make all images visible after 2 seconds if JS doesn't load */
@keyframes fadeInFallback {
    from { opacity: 0; }
    to { opacity: 1; }
}

img:not(.loaded) {
    animation: fadeInFallback 0.5s ease-in-out 2s forwards;
}

/* Lazy loading placeholder */
img[src*="placeholder"] {
    background: var(--color-light-gray);
    background-image: linear-gradient(45deg, transparent 25%, rgba(255, 255, 255, .5) 25%, rgba(255, 255, 255, .5) 75%, transparent 75%, transparent),
        linear-gradient(45deg, transparent 25%, rgba(255, 255, 255, .5) 25%, rgba(255, 255, 255, .5) 75%, transparent 75%, transparent);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    animation: loading 1s linear infinite;
}

@keyframes loading {
    0% {
        background-position: 0 0, 10px 10px;
    }

    100% {
        background-position: 20px 20px, 30px 30px;
    }
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-secondary);
    padding: var(--space-xl) 0 var(--space-lg);
    border-top: 4px solid var(--color-accent);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex: 1;
}

.footer__logo {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.footer__text {
    color: var(--color-white);
    font-size: var(--fs-small);
    margin: 0;
    max-width: 300px;
}

.footer__links {
    color: var(--color-white);
    font-size: var(--fs-small);
}

/* Responsive Footer */
@media (max-width: 768px) {
    .footer__content {
        flex-direction: column;
        text-align: center;
    }

    .footer__brand {
        flex-direction: column;
        text-align: center;
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-dominant: #FFFFFF;
        --color-secondary: #000000;
        --color-accent: #FF0000;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-dominant: #1a1a1a;
        --color-secondary: #ffffff;
        --color-white: #1a1a1a;
        --color-light-gray: #333333;
        --color-medium-gray: #cccccc;
    }
}

/* Print styles */
@media print {

    .header,
    .scroll-to-top,
    .nav__toggle {
        display: none !important;
    }

    body {
        padding-top: 0;
    }

    .section {
        page-break-inside: avoid;
    }

    .hero,
    .solution-detail,
    .contact {
        page-break-after: always;
    }
}

/* ===== CROSS-BROWSER COMPATIBILITY ===== */
/* CSS Grid fallback for older browsers */
@supports not (display: grid) {

    .advantage__grid,
    .solutions__grid,
    .partners__grid,
    .sectors__grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .advantage__card,
    .solution__card,
    .partner__item,
    .sector__card {
        flex: 1 1 300px;
        max-width: 400px;
        margin: var(--space-sm);
    }

    .hero__container,
    .solution-detail__content,
    .about__content,
    .contact__content {
        display: block;
    }

    .hero__image,
    .solution-detail__image,
    .about__panel,
    .contact__form-container {
        margin-top: var(--space-xl);
    }
}

/* Flexbox fallback for CSS Grid */
@supports not (display: grid) {
    .grid {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    }
}

/* Vendor prefixes for better browser support */
.hero__img,
.solution-detail__img,
.sector__img {
    -webkit-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
    -webkit-transition: -webkit-transform var(--transition-slow);
    transition: -webkit-transform var(--transition-slow);
    transition: transform var(--transition-slow);
    transition: transform var(--transition-slow), -webkit-transform var(--transition-slow);
}

.btn,
.solution__card,
.advantage__card,
.partner__item,
.sector__card {
    -webkit-transform: translateY(0);
    -ms-transform: translateY(0);
    transform: translateY(0);
    -webkit-transition: all var(--transition-normal);
    transition: all var(--transition-normal);
}

/* Backdrop filter fallback */
@supports not (backdrop-filter: blur(10px)) {
    .header.scrolled {
        background-color: var(--color-secondary);
    }
    
    .header.scrolled .nav__link {
        color: var(--color-white);
    }
    
    .header.scrolled .nav__toggle-line {
        background-color: var(--color-white);
    }

    .contact__form-container {
        background: rgba(255, 255, 255, 0.1);
    }
}

/* ===== ADDITIONAL RESPONSIVE BREAKPOINTS ===== */
/* Extra small devices (phones, 320px and up) */
@media (max-width: 320px) {
    :root {
        --container-padding: 0.5rem;
        --space-2xl: 2rem;
    }

    .hero__title {
        font-size: 1.75rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--fs-small);
    }
}

/* Large tablets (768px to 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .hero__container {
        gap: var(--space-xl);
    }

    .solution-detail__content {
        gap: var(--space-xl);
    }

    .contact__content {
        gap: var(--space-xl);
    }
}

/* Large desktops (1200px and up) */
@media (min-width: 1200px) {
    :root {
        --fs-h1: 4rem;
        --fs-h2: 2.5rem;
        --container-max-width: 1400px;
    }

    .hero__container {
        gap: var(--space-2xl);
    }

    .advantage__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .solutions__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
/* Focus indicators for keyboard navigation */
.nav__link:focus,
.btn:focus,
.solution__card:focus,
.form__input:focus,
.form__textarea:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 10000;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
}

/* High contrast focus indicators */
@media (prefers-contrast: high) {
    *:focus {
        outline: 3px solid currentColor;
        outline-offset: 3px;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {

    .hero__img,
    .solution-detail__img,
    .sector__img {
        transition: none;
    }

    .btn:hover,
    .solution__card:hover,
    .advantage__card:hover {
        transform: none;
    }
}

/* ===== BROWSER-SPECIFIC FIXES ===== */
/* Safari specific fixes */
@supports (-webkit-appearance: none) {

    .form__input,
    .form__textarea {
        -webkit-appearance: none;
    }

    .btn {
        -webkit-appearance: none;
    }
}

/* Firefox specific fixes */
@-moz-document url-prefix() {

    .form__input,
    .form__textarea {
        -moz-appearance: none;
    }
}

/* Internet Explorer 11 fixes */
@media screen and (-ms-high-contrast: active),
(-ms-high-contrast: none) {
    .flex {
        display: -ms-flexbox;
    }

    .flex-center {
        -ms-flex-align: center;
        -ms-flex-pack: center;
    }

    .flex-between {
        -ms-flex-align: center;
        -ms-flex-pack: justify;
    }
}

/* ===== LOADING STATES ===== */
.loading {
    opacity: 0.7;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--color-accent);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== ERROR STATES ===== */
.error {
    border-color: #ff4444 !important;
    background-color: rgba(255, 68, 68, 0.1) !important;
}

.success {
    border-color: #44ff44 !important;
    background-color: rgba(68, 255, 68, 0.1) !important;
}