/* ==========================================
   AQUAROM - Professional Research Website
   Modern, Minimal, Clean Design
   ========================================== */

:root {
    /* Modern Color Palette */
    --color-primary: #0066CC;
    --color-primary-dark: #004C99;
    --color-accent: #00A3A3;
    --color-dark: #0A1628;
    --color-gray-900: #1A2332;
    --color-gray-700: #475569;
    --color-gray-500: #64748B;
    --color-gray-300: #CBD5E1;
    --color-gray-100: #F1F5F9;
    --color-gray-50: #F8FAFC;
    --color-white: #FFFFFF;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* ==========================================
   Reset & Base
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    color: var(--color-gray-900);
    line-height: 1.6;
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all 0.2s;
}

a:hover {
    color: var(--color-primary-dark);
}

/* ==========================================
   Layout
   ========================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

.section-alt {
    background: var(--color-gray-50);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-xl);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.section-intro {
    font-size: 1.125rem;
    color: var(--color-gray-700);
    line-height: 1.7;
}

/* Grid */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

/* ==========================================
   Navigation
   ========================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-100);
    z-index: 1000;
    transition: all 0.3s;
}

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

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: -0.5px;
}

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

.nav-links a {
    color: var(--color-gray-700);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--color-primary);
}

.btn-nav {
    background: var(--color-primary);
    color: var(--color-white) !important;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.btn-nav:hover {
    background: var(--color-primary-dark) !important;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    transition: all 0.3s;
}

/* ==========================================
   Hero
   ========================================== */

.hero-section {
    position: relative;
    padding: 10rem 0 8rem;
    margin-top: 70px;
    background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(0, 102, 204, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(0, 163, 163, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.hero-h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.15;
    margin-bottom: var(--space-md);
    letter-spacing: -1px;
}

.hero-lead {
    font-size: 1.25rem;
    color: var(--color-gray-700);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto var(--space-md);
}

.hero-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-lg);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 0.9375rem;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-dark);
    border: 2px solid var(--color-gray-300);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-full {
    width: 100%;
}

/* ==========================================
   Feature Cards
   ========================================== */

.feature-card {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--color-gray-700);
    line-height: 1.7;
}

/* ==========================================
   Objectives
   ========================================== */

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.objective-card {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-accent);
    transition: all 0.3s;
}

.objective-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.objective-num {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-gray-100);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.objective-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.objective-card p {
    color: var(--color-gray-700);
    line-height: 1.6;
}

/* ==========================================
   Partners
   ========================================== */

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

.partner-item {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-100);
    transition: all 0.2s;
}

.partner-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.partner-flag {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.partner-item h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
}

.partner-item p {
    color: var(--color-gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ==========================================
   Updates
   ========================================== */

.updates-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.update-card {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
}

.update-date {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.update-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.update-card p {
    color: var(--color-gray-700);
    margin-bottom: var(--space-md);
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    font-weight: 600;
    color: var(--color-primary);
}

.link-arrow:hover {
    gap: 0.5rem;
}

.cta-card {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.cta-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.cta-card p {
    margin-bottom: var(--space-md);
    opacity: 0.95;
}

.cta-card .btn {
    background: var(--color-white);
    color: var(--color-primary);
}

.cta-card .btn:hover {
    transform: translateY(-2px);
}

/* ==========================================
   Contact
   ========================================== */

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

.contact-info h2 {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    color: var(--color-dark);
    margin-bottom: var(--space-md);
}

.contact-info p {
    color: var(--color-gray-700);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

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

.contact-item {
    padding: var(--space-md);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
}

.contact-item strong {
    display: block;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    font-weight: 600;
}

.contact-item p {
    margin: 0.25rem 0;
    font-size: 0.9375rem;
}

.contact-form-box {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-sm);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
    transition: all 0.2s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.contact-form textarea {
    resize: vertical;
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    background: var(--color-dark);
    color: var(--color-gray-300);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer h3, .footer h4 {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.footer a {
    color: var(--color-gray-300);
    display: block;
    margin: 0.5rem 0;
}

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

.footer-years {
    color: var(--color-accent);
    font-weight: 600;
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.875rem;
}

/* ==========================================
   Responsive
   ========================================== */

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

    .menu-toggle {
        display: flex;
    }

    .hero-section {
        padding: 6rem 0 4rem;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* ==========================================
   Smooth Animations
   ========================================== */

section[id] {
    scroll-margin-top: 100px;
}

@media (prefers-reduced-motion: no-preference) {
    .feature-card,
    .objective-card,
    .partner-item,
    .update-card {
        opacity: 0;
        animation: fadeInUp 0.6s ease-out forwards;
    }

    .feature-card:nth-child(1) { animation-delay: 0.1s; }
    .feature-card:nth-child(2) { animation-delay: 0.2s; }
    .feature-card:nth-child(3) { animation-delay: 0.3s; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}