/* =====================================================
   THE WEDDING ATELIER - Main CSS Design System
   Premium Digital Wedding Invitation Platform
   ===================================================== */

/* ===== CSS Variables / Design Tokens ===== */
:root {
    /* Colors */
    --color-bg: #F5EFE4;
    --color-accent: #9E2F3F;
    --color-secondary: #D8C7B8;
    --color-text: #6F2B35;
    --color-text-light: #A68A8E;
    --color-border: rgba(158, 47, 63, 0.15);
    --color-border-light: rgba(158, 47, 63, 0.08);
    --color-white: #FFFFFF;
    --color-overlay: rgba(111, 43, 53, 0.4);
    --color-success: #4CAF50;
    --color-error: #D32F2F;
    --color-warning: #F9A825;

    /* Typography */
    --font-heading: 'Cormorant Garamond', 'Playfair Display', Georgia, serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --font-display-alt: 'Bodoni Moda', 'Playfair Display', serif;
    --font-body: 'Inter', 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-body-alt: 'Plus Jakarta Sans', 'Inter', sans-serif;

    /* Typography scale */
    --text-xs: 0.7rem;
    --text-sm: 0.8rem;
    --text-base: 0.95rem;
    --text-lg: 1.1rem;
    --text-xl: 1.35rem;
    --text-2xl: 1.8rem;
    --text-3xl: 2.4rem;
    --text-4xl: 3.2rem;
    --text-5xl: 4.5rem;

    /* Line heights */
    --leading-tight: 1.15;
    --leading-snug: 1.3;
    --leading-normal: 1.6;
    --leading-relaxed: 1.8;
    --leading-loose: 2;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    --space-5xl: 128px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(111, 43, 53, 0.05);
    --shadow-md: 0 4px 12px rgba(111, 43, 53, 0.08);
    --shadow-lg: 0 8px 32px rgba(111, 43, 53, 0.1);
    --shadow-xl: 0 16px 48px rgba(111, 43, 53, 0.12);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-smooth: 600ms cubic-bezier(0.65, 0, 0.35, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: var(--font-body);
    font-size: 1rem;
}

ul, ol {
    list-style: none;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: var(--leading-tight);
    color: var(--color-text);
    letter-spacing: -0.01em;
}

body {
    font-weight: 350;
    letter-spacing: 0.01em;
}

.section-label {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    display: block;
    font-weight: 500;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    font-weight: 400;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
    line-height: var(--leading-snug);
}

.section-subtitle {
    font-size: var(--text-base);
    color: var(--color-text-light);
    max-width: 520px;
    margin: 0 auto;
    line-height: var(--leading-relaxed);
    font-weight: 350;
}

.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.divider-line {
    width: 60px;
    height: 1px;
    background: var(--color-border);
}

.divider-icon {
    color: var(--color-accent);
    font-size: 0.75rem;
}

/* ===== Layout ===== */
.section-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.invitation-main section:not(#cover) {
    padding: var(--space-4xl) 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .invitation-main { padding-bottom: 80px; }
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 16px 36px;
    background: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-body-alt);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.04em;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.12), transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn-primary:hover {
    background: #8a2836;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover::after {
    opacity: 1;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 14px 28px;
    background: transparent;
    color: var(--color-accent);
    font-family: var(--font-body-alt);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.03em;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-secondary:hover {
    background: rgba(158, 47, 63, 0.05);
    border-color: var(--color-accent);
}

/* ===== Form Elements ===== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    color: var(--color-text);
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(158, 47, 63, 0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(111, 43, 53, 0.35);
}

.form-row {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

/* ===== Opening Screen ===== */
.opening-screen {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.opening-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.opening-screen::before {
    content: '';
    position: absolute;
    inset: 24px;
    border: 1px solid rgba(158,47,63,0.2);
    pointer-events: none;
    animation: openingBorderIn 1.2s ease forwards;
}

@keyframes openingBorderIn {
    0% { opacity: 0; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1); }
}

.opening-screen.hidden::before {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.opening-content {
    text-align: center;
    padding: var(--space-2xl);
    position: relative;
    z-index: 2;
}

.opening-border {
    width: 60px;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-lg) auto;
}

.opening-subtitle {
    font-family: var(--font-body);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.opening-names {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 300;
    line-height: var(--leading-snug);
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

.opening-bride, .opening-groom {
    display: block;
}

.opening-amp {
    font-size: 0.6em;
    font-style: italic;
    color: var(--color-accent);
    display: block;
    margin: var(--space-xs) 0;
}

.opening-guest {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.opening-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 16px 40px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.06em;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.opening-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.opening-btn:hover {
    background: #8a2836;
    transform: scale(1.03);
}

.opening-btn:hover::after {
    opacity: 1;
}

.opening-btn:active {
    transform: scale(0.98);
}

.opening-btn-icon {
    font-size: var(--text-sm);
}

/* ===== Music Toggle ===== */
.music-toggle {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.music-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-accent);
    color: var(--color-white);
    transition: all var(--transition-base);
}

.music-btn:hover {
    transform: scale(1.05);
}

.music-icon.paused { display: none; }
.music-toggle.paused .music-icon.playing { display: none; }
.music-toggle.paused .music-icon.paused { display: block; }

.music-label {
    font-size: 0.8rem;
    color: var(--color-text-light);
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== Side Navigation (Desktop) ===== */
.side-nav {
    position: fixed;
    right: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    z-index: 99;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.side-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all var(--transition-fast);
    opacity: 0.4;
}

.side-nav-item:hover,
.side-nav-item.active {
    opacity: 1;
}

.side-nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
}

.side-nav-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text);
    opacity: 0;
    transform: translateX(8px);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.side-nav-item:hover .side-nav-label,
.side-nav-item.active .side-nav-label {
    opacity: 1;
    transform: translateX(0);
}

/* ===== Bottom Navigation (Mobile) ===== */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 99;
    background: rgba(245, 239, 228, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--color-border);
    padding: 8px 16px;
    justify-content: space-around;
}

.bottom-nav-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    opacity: 0.4;
}

.bottom-nav-item.active {
    opacity: 1;
    background: rgba(158, 47, 63, 0.08);
}

.bottom-nav-icon {
    font-size: 1.1rem;
}

/* ===== Mobile More Menu ===== */
.mobile-more-menu {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-more-menu.open {
    display: block;
    opacity: 1;
}

.mobile-more-overlay {
    position: absolute;
    inset: 0;
    background: rgba(111, 43, 53, 0.3);
    backdrop-filter: blur(4px);
}

.mobile-more-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: var(--space-lg);
    max-height: 60vh;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform var(--transition-smooth);
}

.mobile-more-menu.open .mobile-more-content {
    transform: translateY(0);
}

.mobile-more-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.mobile-more-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0,0,0,0.05);
    font-size: 1rem;
    color: var(--color-text);
}

.mobile-more-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.95rem;
}

.mobile-more-icon {
    font-size: 1.2rem;
}

/* ===== WhatsApp Float ===== */
.whatsapp-float {
    position: fixed;
    bottom: 80px;
    right: var(--space-lg);
    z-index: 100;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: #25D366;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 80px;
        right: var(--space-md);
    }
}

/* ===== Animations ===== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.animate-fade-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.delay-200 { transition-delay: 0.2s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }
.delay-600 { transition-delay: 0.6s; }

/* ===== Error Pages ===== */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
}

.error-container {
    text-align: center;
    padding: var(--space-2xl);
}

.error-code {
    font-family: var(--font-heading);
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: 300;
    color: var(--color-accent);
    opacity: 0.3;
    margin-bottom: var(--space-md);
}

.error-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.error-message {
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
}

.error-btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    transition: all var(--transition-base);
}

.error-btn:hover {
    background: #8a2836;
}

.error-body {
    background: var(--color-bg);
}

/* ===== Responsive Navigation ===== */
@media (max-width: 768px) {
    .side-nav { display: none; }
    .bottom-nav { display: flex; }
    .invitation-main section {
        padding: var(--space-2xl) 0;
        min-height: auto;
    }
    .section-container {
        padding: 0 var(--space-md);
    }
    .music-toggle {
        top: var(--space-sm);
        right: var(--space-sm);
    }
}

@media (min-width: 1024px) {
    .side-nav { display: flex; }
    .bottom-nav { display: none; }
}

/* ===== Sparkle Animation ===== */
@keyframes sparkleFloat {
    0%, 100% {
        opacity: 0.1;
        transform: translateY(0) scale(1);
    }
    50% {
        opacity: 0.5;
        transform: translateY(-20px) scale(1.5);
    }
}

/* ===== Home Page ===== */
.home-page {
    min-height: 100vh;
}

.home-hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.home-hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    padding: var(--space-xl);
}

.home-hero-subtitle {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.home-hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.home-hero-description {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.home-hero-cta {
    font-size: 0.95rem;
}

.home-hero-sparkles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.home-invitations {
    padding: var(--space-4xl) 0;
}

.home-section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--space-2xl);
    color: var(--color-text);
}

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

.home-card {
    display: block;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.home-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.home-card-image {
    height: 240px;
}

.home-card-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #F5EFE4, #D8C7B8);
    display: flex;
    align-items: center;
    justify-content: center;
}

.home-card-initials {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--color-accent);
    opacity: 0.6;
}

.home-card-info {
    padding: var(--space-lg);
}

.home-card-info h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: var(--space-xs);
}

.home-card-info p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.home-empty {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-text-light);
}

.home-empty p {
    margin-bottom: var(--space-lg);
}

.home-features {
    padding: var(--space-4xl) 0;
    background: rgba(216, 199, 184, 0.1);
}

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

.feature-card {
    text-align: center;
    padding: var(--space-xl);
}

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

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.home-footer {
    text-align: center;
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border-light);
    font-size: 0.85rem;
    color: var(--color-text-light);
}