/* ===================================
   التداخلات الغذائية الدوائية Nutidrug interact Landing Page
   Developed by Feras Swed
   =================================== */

/* === CSS Variables === */
:root {
    /* Medical Blue Colors */
    --primary-blue: #2563eb;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1e40af;

    /* Medical Green Colors */
    --primary-green: #10b981;
    --primary-green-light: #34d399;
    --primary-green-dark: #059669;

    /* Accent Colors */
    --accent-teal: #14b8a6;
    --accent-purple: #8b5cf6;

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0 .2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Global Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Cairo', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Arabic Font */
html[lang="ar"] body {
    font-family: 'Cairo', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* English Font */
html[lang="en"] body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* === Container === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-2xl);
    }
}

/* === Navbar === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
}

@media (max-width: 768px) {
    .nav-container {
        padding: var(--spacing-md) var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-sm) var(--spacing-lg);
        /* Ensure enough horizontal space from borders */
    }
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

@media (max-width: 640px) {
    .logo-container {
        gap: var(--spacing-sm);
    }
}

.logo {
    height: 48px;
    width: auto;
    border-radius: var(--radius-md);
}

@media (max-width: 480px) {
    .logo {
        height: 36px;
    }
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .desktop-only {
        display: none;
    }

    .mobile-only {
        display: inline-block;
    }

    .brand-name {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .brand-name {
        font-size: 0.9rem;
    }
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

@media (max-width: 640px) {
    .nav-actions {
        gap: var(--spacing-xs);
    }
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

@media (max-width: 480px) {
    .lang-switch {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.85rem;
    }
}

.lang-switch:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.05;
    z-index: -1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

@media (min-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    text-align: center;
    margin-top: var(--spacing-xl);
}

@media (max-width: 640px) {
    .hero-content {
        margin-top: var(--spacing-lg);
    }
}

@media (min-width: 968px) {
    html[dir="rtl"] .hero-content {
        text-align: right;
    }

    html[dir="ltr"] .hero-content {
        text-align: left;
    }
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    animation: badge-pulse 2s ease-in-out infinite;
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 0.75rem;
        padding: 0.375rem var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
}

@keyframes badge-pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .hero-subtitle {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: var(--spacing-md);
    }
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 968px) {
    html[dir="rtl"] .hero-description {
        margin-right: 0;
    }

    html[dir="ltr"] .hero-description {
        margin-left: 0;
    }
}

@media (max-width: 640px) {
    .hero-description {
        font-size: 0.95rem;
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .hero-description {
        font-size: 0.875rem;
        line-height: 1.5;
    }
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
}

@media (min-width: 968px) {
    html[dir="rtl"] .hero-buttons {
        justify-content: flex-start;
    }

    html[dir="ltr"] .hero-buttons {
        justify-content: flex-start;
    }
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-xl);
    max-width: 500px;
    margin: 0 auto;
}

@media (min-width: 968px) {
    .hero-stats {
        margin: 0;
    }
}

@media (max-width: 640px) {
    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hero-stats {
        gap: var(--spacing-sm);
    }
}

.stat {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

@media (max-width: 640px) {
    .stat {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .stat {
        padding: var(--spacing-sm);
    }
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

@media (max-width: 640px) {
    .stat-number {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .stat-number {
        font-size: 1.25rem;
    }
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
}

@media (max-width: 640px) {
    .stat-label {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .stat-label {
        font-size: 0.7rem;
        line-height: 1.3;
    }
}

/* Hero Image */
.hero-image {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.app-icon-large {
    width: 100%;
    height: auto;
    border-radius: var(--radius-2xl);
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.15));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

.floating-card {
    position: absolute;
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    animation: float-card 4s ease-in-out infinite;
}

@media (max-width: 640px) {
    .floating-card {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .floating-card {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

.card-1 {
    top: 10%;
    right: -10%;
    color: var(--primary-blue);
    animation-delay: 0s;
}

@media (max-width: 640px) {
    .card-1 {
        right: 5%;
        top: 5%;
    }
}

.card-2 {
    top: 50%;
    left: -10%;
    color: var(--primary-green);
    animation-delay: 1s;
}

@media (max-width: 640px) {
    .card-2 {
        left: 5%;
        top: 40%;
    }
}

.card-3 {
    bottom: 10%;
    right: -5%;
    color: var(--accent-teal);
    animation-delay: 2s;
}

@media (max-width: 640px) {
    .card-3 {
        right: 10%;
        bottom: 5%;
    }
}

@keyframes float-card {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-15px) rotate(5deg);
    }
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

@media (max-width: 640px) {
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .btn-large {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
        width: 100%;
        justify-content: center;
    }
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-outline {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-outline:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.btn-download {
    background: var(--primary-green);
    color: var(--white);
    padding: var(--spacing-lg) var(--spacing-3xl);
    font-size: 1.25rem;
    box-shadow: var(--shadow-xl);
}

.btn-download:hover {
    background: var(--primary-green-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

/* === Sections === */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

/* === Features Section === */
.features {
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 968px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.7;
}

/* === About Section === */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

@media (min-width: 968px) {
    .about-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

.about-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.about-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--white);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.team-list {
    list-style: none;
    text-align: center;
}

.team-list li {
    padding: var(--spacing-sm) 0;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-200);
}

.team-list li:last-child {
    border-bottom: none;
}

.supervisor-name,
.developer-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.supervisor-title,
.developer-title {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    text-decoration: none;
    transition: var(--transition-base);
}

.social-link:hover {
    transform: translateY(-4px) rotate(5deg);
    box-shadow: var(--shadow-xl);
}

/* Disclaimer */
.disclaimer {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 2px solid #f59e0b;
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.disclaimer-icon {
    font-size: 2rem;
    color: #d97706;
    flex-shrink: 0;
}

.disclaimer-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #92400e;
    margin-bottom: var(--spacing-sm);
}

.disclaimer-content p {
    color: #78350f;
    line-height: 1.7;
}

/* === Download Section === */
.download {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    color: var(--white);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

@media (min-width: 968px) {
    .download-content {
        grid-template-columns: 1fr 1fr;
    }
}

.download-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.download-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}

.download-details {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.detail-item i {
    font-size: 1.25rem;
}

.download-note {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

/* Installation Steps */
.install-steps {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
}

.steps-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

.steps-list {
    list-style: none;
    counter-reset: step-counter;
}

.steps-list li {
    counter-increment: step-counter;
    position: relative;
    padding: var(--spacing-lg);
    padding-right: 4rem;
    margin-bottom: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

html[dir="ltr"] .steps-list li {
    padding-right: var(--spacing-lg);
    padding-left: 4rem;
}

.steps-list li::before {
    content: counter(step-counter);
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: var(--white);
    color: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

html[dir="ltr"] .steps-list li::before {
    right: auto;
    left: var(--spacing-lg);
}

/* === Footer === */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-logo {
    height: 80px;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-xl);
}

.footer-description {
    color: var(--gray-300);
    line-height: 1.7;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-base);
    display: block;
    padding: var(--spacing-xs) 0;
}

.footer-links a:hover {
    color: var(--white);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-info a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-base);
}

.contact-info a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: var(--gray-500);
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
}

.footer-credit a {
    color: var(--primary-blue-light);
    text-decoration: none;
}

.footer-credit a:hover {
    text-decoration: underline;
}

/* === Scroll to Top === */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

html[dir="rtl"] .scroll-top {
    right: auto;
    left: 30px;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

/* === Animations === */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    animation: fade-in-up 0.6s ease-out;
}

/* === Responsive === */
/* Additional mobile optimizations */
@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero {
        padding-top: 70px;
        min-height: auto;
        padding-bottom: var(--spacing-2xl);
    }

    .hero-container {
        gap: var(--spacing-xl);
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .hero {
        padding-top: 65px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .phone-mockup {
        max-width: 280px;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-container {
        gap: var(--spacing-lg);
    }
}

/* === Privacy Policy Page === */
.privacy-policy {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    min-height: 100vh;
}

.privacy-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 2px solid var(--gray-200);
}

.privacy-title {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
    .privacy-title {
        font-size: 2rem;
    }
}

.privacy-app-name {
    font-size: 1.25rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
}

.privacy-date {
    font-size: 1rem;
    color: var(--gray-600);
}

.privacy-intro {
    background: var(--gray-50);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-3xl);
    border-left: 4px solid var(--primary-blue);
}

html[dir="ltr"] .privacy-intro {
    border-left: none;
    border-right: 4px solid var(--primary-blue);
}

.privacy-intro p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-700);
    margin: 0;
}

.privacy-section {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-2xl);
    transition: var(--transition-base);
}

.privacy-section:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.section-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.privacy-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
    .privacy-section h2 {
        font-size: 1.5rem;
    }
}

.privacy-section p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
}

.privacy-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-lg) 0;
}

.privacy-list li {
    position: relative;
    padding: var(--spacing-md);
    padding-right: var(--spacing-3xl);
    margin-bottom: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    line-height: 1.7;
    color: var(--gray-700);
}

html[dir="ltr"] .privacy-list li {
    padding-right: var(--spacing-md);
    padding-left: var(--spacing-3xl);
}

.privacy-list li::before {
    content: "✓";
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background: var(--primary-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

html[dir="ltr"] .privacy-list li::before {
    right: auto;
    left: var(--spacing-md);
}

.privacy-section a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-base);
}

.privacy-section a:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

.contact-email {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
}

.contact-email a {
    color: var(--primary-blue);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    display: inline-block;
    transition: var(--transition-base);
}

.contact-email a:hover {
    background: var(--primary-blue);
    color: var(--white);
}

@media (max-width: 768px) {
    .privacy-policy {
        padding: calc(70px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }

    .privacy-section {
        padding: var(--spacing-lg);
    }

    .privacy-intro {
        padding: var(--spacing-lg);
    }
}

/* === Navbar Buttons in Navbar === */
.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--primary-blue);
    background: var(--gray-50);
}

.nav-link.active {
    color: var(--primary-blue);
    background: rgba(37, 99, 235, 0.05);
    border-color: rgba(37, 99, 235, 0.1);
}

@media (max-width: 768px) {

    .nav-link span,
    .lang-switch span#langText {
        display: none;
    }

    .nav-link,
    .lang-switch {
        padding: var(--spacing-sm);
        min-width: auto;
    }

    .nav-link i,
    .lang-switch i {
        margin: 0;
    }
}

@media (max-width: 480px) {

    .privacy-link,
    .home-link {
        padding: 0.5rem;
        font-size: 1rem;
    }
}

/* ===================================
   ABOUT US PAGE STYLES
   =================================== */

/* About Hero Section */
.about-hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    padding: calc(70px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    text-align: center;
    color: var(--white);
}

.about-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.6s ease-out;
}

.about-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease-out;
}

/* Mission Section */
.mission-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background);
}

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

.mission-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition-base);
}

.mission-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.mission-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.mission-card h2 {
    font-size: 1.75rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.mission-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Stats Section */
.stats-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--background);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.stat-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Academic Section */
.academic-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-2xl);
}

.academic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.academic-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.academic-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.academic-card i {
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
}

.academic-card h3 {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.academic-card p {
    color: var(--text-secondary);
}

/* Team Section */
.team-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.team-category {
    margin-bottom: var(--spacing-3xl);
}

.team-category-title {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.team-category-desc {
    text-align: center;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.8;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.team-member {
    background: var(--background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.member-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
}

.team-member h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.member-role {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Supervisor Card */
.supervisor-card {
    background: var(--background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}

.supervisor-avatar {
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--white);
    flex-shrink: 0;
}

.supervisor-info h4 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.supervisor-title {
    color: var(--primary-green-dark);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.supervisor-institution {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.supervisor-role {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Developer Card */
.developer-card {
    background: var(--background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}

.developer-avatar {
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--white);
    flex-shrink: 0;
}

.developer-info h4 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.developer-title {
    color: var(--primary-green-dark);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.developer-responsibilities {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-md);
}

.developer-responsibilities li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-right: 1.5rem;
}

[dir="ltr"] .developer-responsibilities li {
    padding-right: 0;
    padding-left: 1.5rem;
}

.developer-responsibilities li::before {
    content: "✓";
    position: absolute;
    right: 0;
    color: var(--primary-green);
    font-weight: bold;
}

[dir="ltr"] .developer-responsibilities li::before {
    right: auto;
    left: 0;
}

.developer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    transition: var(--transition-base);
}

.social-link:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Technology Section */
.technology-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.tech-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tech-card i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.tech-card h3 {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.tech-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Sources Section */
.sources-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.sources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.source-card {
    background: var(--background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
}

.source-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.source-card i {
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
}

.source-card h3 {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.source-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design for About Page */
@media (max-width: 768px) {
    .about-title {
        font-size: 2rem;
    }

    .about-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .team-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .supervisor-card,
    .developer-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .developer-avatar,
    .supervisor-avatar {
        margin: 0 auto var(--spacing-md);
    }

    .developer-responsibilities li {
        padding-right: 0;
        padding-left: 0;
    }

    .developer-responsibilities li::before {
        position: static;
        margin-left: var(--spacing-xs);
    }

    [dir="ltr"] .developer-responsibilities li::before {
        margin-left: 0;
        margin-right: var(--spacing-xs);
    }

    .developer-social {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .about-hero {
        padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl);
    }

    .mission-section .container {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .stat-number {
        font-size: 2rem;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .member-avatar,
    .supervisor-avatar,
    .developer-avatar {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
}

/* === Feedback Section === */
.feedback-section {
    background-color: var(--gray-50);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.feedback-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    max-width: 800px;
    margin: 0 auto;
    border-top: 4px solid var(--primary-blue);
}

.feedback-icon {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.feedback-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.feedback-text {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

/* Floating Feedback Button */
.floating-feedback {
    position: fixed;
    bottom: 100px;
    right: 30px;
    background: var(--gradient-primary);
    color: var(--white);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-2xl);
    text-decoration: none;
    z-index: 999;
    transition: var(--transition-base);
    font-size: 1.5rem;
}

.floating-feedback:hover {
    transform: scale(1.1) rotate(10deg);
}

.floating-feedback .btn-text {
    display: none;
    position: absolute;
    right: 70px;
    background: var(--gray-800);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    white-space: nowrap;
}

.floating-feedback:hover .btn-text {
    display: block;
}

@media (max-width: 768px) {
    .floating-feedback {
        bottom: 90px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .floating-feedback .btn-text {
        display: none !important;
    }
}