/* ===== COSTA INDUSTRIES - MAIN STYLESHEET ===== */

/* ===== CSS VARIABLES (Design Tokens) ===== */
:root {
    /* Colors - Light Theme */
    --bg-primary: #FAFBFC;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F5F6F7;

    --text-primary: #1A1D23;
    --text-secondary: #4A5568;
    --text-tertiary: #718096;

    --accent-primary: #C1A57B;
    --accent-secondary: #8B7355;
    --accent-border: #E2D5C5;

    --divider: #E8EAED;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.16);

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;
    --space-12: 6rem;
    --space-16: 8rem;

    /* Animations */
    --ease-elegant: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
    --duration-fast: 200ms;
    --duration-medium: 300ms;
    --duration-slow: 400ms;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0F1419;
    --bg-secondary: #1A1F28;
    --bg-tertiary: #242933;

    --text-primary: #E8EAED;
    --text-secondary: #A0A8B0;
    --text-tertiary: #6B7280;

    --accent-primary: #D4AF6A;
    --accent-secondary: #B8935A;
    --accent-border: #3A3F4A;

    --divider: #2A2F3A;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.6);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--duration-slow) var(--ease-elegant),
                color var(--duration-slow) var(--ease-elegant);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    font-weight: 700;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* ===== HEADER ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(250, 251, 252, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(226, 213, 197, 0.3);
    padding: var(--space-4) var(--space-6);
    transition: all var(--duration-slow) var(--ease-elegant);
}

[data-theme="dark"] .header {
    background: rgba(15, 20, 25, 0.85);
    border-bottom: 1px solid rgba(58, 63, 74, 0.5);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-md);
    transition: transform var(--duration-medium) var(--ease-elegant);
}

.logo:hover .logo-icon {
    transform: scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-main {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 300;
    letter-spacing: 3px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
    letter-spacing: 0.5px;
    transition: color var(--duration-fast) var(--ease-elegant);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--duration-medium) var(--ease-elegant);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: var(--space-2) var(--space-5);
    border-radius: 24px;
    font-weight: 600;
}

.nav-link-primary::after {
    display: none;
}

.nav-link-primary:hover {
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.nav-link-login {
    background: transparent;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: var(--space-2) var(--space-5);
    border-radius: 24px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-link-login::after {
    display: none;
}

.nav-link-login:hover {
    background: var(--accent-primary);
    color: white;
    transform: scale(1.05);
}

.nav-link-profile {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--bg-tertiary);
    padding: var(--space-2) var(--space-4);
    border-radius: 24px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-link-profile::after {
    display: none;
}

.nav-link-profile:hover {
    background: var(--accent-primary);
    color: white;
    transform: scale(1.05);
}

.user-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    font-size: 1.2rem;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: var(--space-12) var(--space-6);
}

.hero-content {
    max-width: 1200px;
    text-align: center;
    position: relative;
    z-index: 2;
    animation: fadeInUp 800ms var(--ease-elegant);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--text-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
}

/* Decorative Floating Cards */
.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.floating-card {
    position: absolute;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0.05;
    border-radius: 16px;
}

.card-1 {
    width: 300px;
    height: 400px;
    top: 10%;
    left: 5%;
    animation: float 8s ease-in-out infinite;
}

.card-2 {
    width: 200px;
    height: 300px;
    top: 50%;
    right: 10%;
    animation: float 10s ease-in-out infinite 2s;
}

.card-3 {
    width: 250px;
    height: 250px;
    bottom: 10%;
    left: 15%;
    animation: float 12s ease-in-out infinite 4s;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: 24px;
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--duration-medium) var(--ease-elegant);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

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

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ===== SECTIONS ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

section {
    padding: var(--space-12) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.section-label {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: var(--space-3);
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--text-primary);
}

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

.about-text {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-10);
    line-height: 1.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    background: var(--bg-primary);
    padding: var(--space-6);
    border-radius: 12px;
    border: 1px solid var(--divider);
    text-align: center;
    transition: all var(--duration-medium) var(--ease-elegant);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.feature-icon {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-4);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.feature-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.cta-content {
    text-align: center;
    padding: var(--space-10) 0;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: white;
}

.cta-subtitle {
    font-size: var(--text-xl);
    margin-bottom: var(--space-8);
    opacity: 0.9;
    font-weight: 300;
}

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

.cta-section .btn-primary:hover {
    background: var(--bg-primary);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--divider);
    padding: var(--space-10) 0 var(--space-6);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    gap: var(--space-6);
}

.footer-brand .logo {
    margin-bottom: var(--space-3);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    font-style: italic;
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

.footer-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: color var(--duration-fast) var(--ease-elegant);
}

.footer-link:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--divider);
}

.footer-bottom p {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.footer-author {
    font-weight: 600;
    color: var(--text-secondary);
}

/* ===== ICONS ===== */
.icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--text-5xl);
    }

    .section-title {
        font-size: var(--text-3xl);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--space-4);
    }

    .nav {
        flex-direction: column;
        gap: var(--space-3);
    }

    .hero {
        min-height: 70vh;
        padding: var(--space-8) var(--space-4);
    }

    .hero-title {
        font-size: var(--text-4xl);
    }

    .hero-subtitle {
        font-size: var(--text-lg);
    }

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

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

    .footer-links {
        flex-direction: column;
        gap: var(--space-3);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--text-3xl);
    }

    .section-title {
        font-size: var(--text-2xl);
    }

    .cta-title {
        font-size: var(--text-3xl);
    }
}