/* ============================================
   SISTER TRIBUTE - LUXURY PASTEL THEME
   A beautiful, emotional, premium website
   ============================================ */

/* CSS Variables - Pastel Luxury Palette */
:root {
    /* Primary Colors */
    --color-pink-light: #FFE4E9;
    --color-pink-soft: #FFD1DC;
    --color-pink-warm: #FFB6C1;
    --color-pink-rose: #F8C8DC;
    --color-pink-deep: #F4A6C3;
    
    /* Secondary Colors */
    --color-lavender: #E6E6FA;
    --color-lavender-soft: #D8BFD8;
    --color-cream: #FFF8E7;
    --color-cream-warm: #FDF5E6;
    --color-gold: #D4AF37;
    --color-gold-light: #F4E4BC;
    
    /* Background Colors */
    --bg-primary: linear-gradient(135deg, #FFF5F7 0%, #F8F0FF 50%, #FFF8E7 100%);
    --bg-secondary: linear-gradient(180deg, #FFE4E9 0%, #E6E6FA 100%);
    --bg-dark: linear-gradient(135deg, #2D1F3D 0%, #1A1A2E 100%);
    
    /* Text Colors */
    --text-primary: #4A4A4A;
    --text-secondary: #6B6B6B;
    --text-light: #8B8B8B;
    --text-white: #FFFFFF;
    --text-gold: #B8860B;
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'Cormorant Garamond', serif;
    --font-script: 'Great Vibes', cursive;
    
    /* Spacing */
    --section-padding: 120px;
    --container-max: 1400px;
    
    /* Effects */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.4);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 60px rgba(255, 182, 193, 0.4);
    
    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* 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(--text-primary);
    background: var(--bg-primary);
    background-attachment: fixed;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ============================================
   PARTICLES BACKGROUND
   ============================================ */
.particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    opacity: 0.6;
    animation: float-particle linear infinite;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

/* ============================================
   MUSIC PLAYER
   ============================================ */
.music-player {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.music-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 25px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-soft);
}

.music-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.music-icon {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.music-toggle.playing .music-icon {
    animation: pulse-music 1s ease-in-out infinite;
}

@keyframes pulse-music {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.music-text {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    transition: var(--transition-smooth);
    background: transparent;
}

.nav-bar.scrolled {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-logo {
    font-size: 2rem;
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    transition: var(--transition-smooth);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-pink-warm), var(--color-lavender-soft));
    transition: var(--transition-smooth);
}

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

.nav-link:hover {
    color: var(--color-pink-deep);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px 20px;
}

.hero-content {
    text-align: center;
    z-index: 2;
    max-width: 900px;
}

.hero-stars {
    font-size: 1.5rem;
    letter-spacing: 20px;
    margin-bottom: 30px;
    opacity: 0.8;
    animation: twinkle 3s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fade-up 1s ease forwards;
}

.title-line:nth-child(1) { animation-delay: 0.3s; }
.title-line:nth-child(2) { animation-delay: 0.6s; }

.title-highlight {
    background: linear-gradient(135deg, var(--color-pink-deep), var(--color-lavender-soft));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-style: italic;
}

.title-heart {
    display: inline-block;
    font-size: 0.8em;
    animation: heartbeat 1.5s ease-in-out infinite;
    margin-left: 10px;
}

@keyframes fade-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    margin-bottom: 50px;
    min-height: 60px;
}

.typing-text {
    font-style: italic;
}

.typing-cursor {
    animation: blink 1s step-end infinite;
    color: var(--color-pink-deep);
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Glowing Button */
.hero-button-container {
    margin-top: 40px;
}

.glow-button {
    display: inline-block;
    padding: 20px 50px;
    background: linear-gradient(135deg, var(--color-pink-warm), var(--color-lavender-soft));
    color: var(--text-white);
    text-decoration: none;
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
    box-shadow: 0 10px 40px rgba(255, 182, 193, 0.4);
}

.glow-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: 0.5s;
}

.glow-button:hover::before {
    left: 100%;
}

.glow-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(255, 182, 193, 0.6);
}

/* Floating Hearts */
.floating-hearts {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-hearts .heart {
    position: absolute;
    font-size: 2rem;
    opacity: 0.6;
    animation: float-heart 6s ease-in-out infinite;
}

.floating-hearts .heart:nth-child(1) { left: 10%; animation-delay: 0s; }
.floating-hearts .heart:nth-child(2) { left: 30%; animation-delay: 1s; }
.floating-hearts .heart:nth-child(3) { left: 50%; animation-delay: 2s; }
.floating-hearts .heart:nth-child(4) { left: 70%; animation-delay: 3s; }
.floating-hearts .heart:nth-child(5) { left: 90%; animation-delay: 4s; }

@keyframes float-heart {
    0%, 100% {
        transform: translateY(100vh) scale(0.5);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100px) scale(1);
    }
}

.hero-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 200px;
    background: linear-gradient(to top, var(--color-pink-light), transparent);
    z-index: 1;
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 80px;
    padding: 0 20px;
}

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

.section-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 20px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--color-pink-deep), var(--color-lavender-soft));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header.light .section-title {
    background: linear-gradient(135deg, #fff, var(--color-pink-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-family: var(--font-body);
    font-size: 1.3rem;
    color: var(--text-secondary);
    font-style: italic;
}

.section-header.light .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   GALLERY SECTION
   ============================================ */
.gallery-section {
    padding: var(--section-padding) 20px;
    position: relative;
}

.gallery-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 300px);
    gap: 25px;
    padding: 0 20px;
}

.gallery-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
}

.gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.gallery-item.large {
    grid-column: span 2;
    grid-row: span 2;
}

.gallery-item.wide {
    grid-column: span 2;
}

.gallery-frame {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-cream), var(--color-pink-light));
    border: 8px solid var(--color-white);
    border-radius: 20px;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.05);
}

.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.gallery-item:hover .gallery-img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-caption {
    color: var(--text-white);
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-style: italic;
}

/* ============================================
   MEMORIES SECTION
   ============================================ */
.memories-section {
    padding: var(--section-padding) 20px;
    background: var(--bg-secondary);
    position: relative;
}

.timeline-container {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding: 0 20px;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-pink-warm), var(--color-lavender-soft));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 80px;
    width: 50%;
    padding: 0 50px;
}

.timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    margin-left: 50%;
    text-align: left;
}

.timeline-card {
    padding: 40px;
    border-radius: 20px;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.timeline-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.timeline-quote {
    display: block;
    font-family: var(--font-script);
    font-size: 1.4rem;
    color: var(--color-pink-deep);
    font-style: italic;
}

/* Glass Card Effect */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
}

/* ============================================
   APPRECIATION SECTION
   ============================================ */
.appreciation-section {
    padding: var(--section-padding) 20px;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

.appreciation-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-flower {
    position: absolute;
    font-size: 3rem;
    opacity: 0.3;
    animation: float-flower 8s ease-in-out infinite;
}

@keyframes float-flower {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(10deg); }
}

.appreciation-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.appreciation-card {
    padding: 60px;
    border-radius: 30px;
    position: relative;
    text-align: center;
}

.card-decoration {
    position: absolute;
    font-size: 4rem;
    color: var(--color-pink-warm);
    opacity: 0.3;
}

.card-decoration.top-left {
    top: 20px;
    left: 30px;
}

.card-decoration.bottom-right {
    bottom: 20px;
    right: 30px;
    transform: rotate(180deg);
}

.appreciation-text {
    font-family: var(--font-body);
    font-size: 1.3rem;
    line-height: 2;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    text-align: justify;
    text-align-last: center;
}

.appreciation-signature {
    margin-top: 50px;
    text-align: center;
}

.signature-line {
    display: block;
    font-family: var(--font-script);
    font-size: 1.5rem;
    color: var(--color-pink-light);
    margin-bottom: 10px;
}

.signature-name {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-gold);
    font-weight: 600;
}

/* ============================================
   SURPRISE SECTION
   ============================================ */
.surprise-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    padding: 100px 20px;
}

.surprise-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.star-field {
    position: absolute;
    width: 100%;
    height: 100%;
}

.star {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-gold);
    border-radius: 50%;
    animation: twinkle-star 2s ease-in-out infinite;
}

@keyframes twinkle-star {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
}

.surprise-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.heart-container {
    position: relative;
    display: inline-block;
    margin-bottom: 50px;
}

.big-heart {
    font-size: 8rem;
    animation: heartbeat-big 1.5s ease-in-out infinite;
    position: relative;
    z-index: 2;
}

@keyframes heartbeat-big {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.1); }
    50% { transform: scale(1); }
    75% { transform: scale(1.05); }
}

.heart-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid var(--color-pink-warm);
    border-radius: 50%;
    opacity: 0;
    animation: ring-expand 2s ease-out infinite;
}

.ring-1 {
    width: 150px;
    height: 150px;
    animation-delay: 0s;
}

.ring-2 {
    width: 200px;
    height: 200px;
    animation-delay: 0.5s;
}

.ring-3 {
    width: 250px;
    height: 250px;
    animation-delay: 1s;
}

@keyframes ring-expand {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

.surprise-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    color: var(--text-primary);
    margin-bottom: 10px;
}

.surprise-subtitle {
    font-family: var(--font-script);
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: linear-gradient(135deg, var(--color-pink-deep), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
}

.surprise-message {
    font-family: var(--font-body);
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-style: italic;
}

.final-hearts {
    margin-top: 60px;
    display: flex;
    justify-content: center;
    gap: 30px;
}

.final-heart {
    font-size: 3rem;
    animation: float-final 3s ease-in-out infinite;
    animation-delay: var(--delay);
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 80px 20px;
    background: linear-gradient(135deg, #2D1F3D 0%, #1A1A2E 100%);
    text-align: center;
    position: relative;
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-hearts {
    font-size: 2rem;
    letter-spacing: 10px;
    margin-bottom: 30px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.footer-text {
    font-family: var(--font-script);
    font-size: 1.8rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
}

.footer-year {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-gold);
    margin-bottom: 30px;
}

.footer-decoration {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-flower {
    font-size: 2rem;
    opacity: 0.6;
    animation: rotate-flower 4s ease-in-out infinite;
}

@keyframes rotate-flower {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(15deg); }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .gallery-container {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 250px);
    }
    
    .gallery-item.large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        width: 100%;
        margin-left: 0;
        text-align: center;
        padding: 0 20px;
    }
    
    .timeline-line {
        left: 20px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-bar {
        padding: 15px 20px;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .nav-link {
        font-size: 0.9rem;
    }
    
    .gallery-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    
    .gallery-item,
    .gallery-item.large,
    .gallery-item.wide {
        grid-column: span 1;
        grid-row: span 1;
        height: 300px;
    }
    
    .appreciation-card {
        padding: 40px 30px;
    }
    
    .appreciation-text {
        font-size: 1.1rem;
    }
    
    .music-player {
        bottom: 20px;
        right: 20px;
    }
    
    .music-toggle {
        padding: 12px 20px;
    }
    
    .music-text {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .glow-button {
        padding: 15px 35px;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline-card {
        padding: 30px 25px;
    }
    
    .big-heart {
        font-size: 5rem;
    }
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

/* Smooth scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-cream);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--color-pink-warm), var(--color-lavender-soft));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(var(--color-pink-deep), var(--color-lavender-soft));
}