/* Global Design & Technical Guidelines */
:root {
    --bg-solid: #FAF7F2;
    --text-primary: #3A332C;
    --accent-primary: #D48C6A;
    --accent-secondary: #C79F68;
    --footer-bg: #3A332C;
    --footer-text: #FAF7F2;

    --font-serif-en: 'Playfair Display', 'Cormorant Garamond', serif;
    --font-sans-en: 'Lato', 'Montserrat', sans-serif;
    --font-serif-zh: 'Noto Serif SC', 'Songti', serif;
    --font-sans-zh: 'PingFang SC', 'Noto Sans SC', sans-serif;
}

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

body {
    font-family: var(--font-sans-en), var(--font-sans-zh);
    color: var(--text-primary);
    background-color: var(--bg-solid);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout & Parallax */
.container {
    height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    perspective: 2px; /* Parallax effect */
}

.parallax-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    transform-style: preserve-3d;
}

.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    transform: translateZ(-1px) scale(1.5); /* Parallax effect */
    z-index: -1;
}

/* Add gradient fades to parallax backgrounds */
#hero .parallax-bg::after,
#visual-divider .parallax-bg::before,
#visual-divider .parallax-bg::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 150px;
    background: linear-gradient(to bottom, transparent, var(--bg-solid));
}

#hero .parallax-bg::after {
    bottom: 0;
    background: linear-gradient(to top, var(--bg-solid), transparent);
}

#visual-divider .parallax-bg::before {
    top: 0;
    background: linear-gradient(to bottom, var(--bg-solid), transparent);
}

#visual-divider .parallax-bg::after {
    bottom: 0;
    background: linear-gradient(to top, var(--bg-solid), transparent);
}


.content {
    width: 100%;
    max-width: 430px; /* iPhone Max width */
    padding: 0 2rem;
    text-align: center;
    margin: 0 auto; /* Center the content block */
}

/* Section-specific styles */

/* Section 1: Hero */
#hero {
    align-items: flex-start;
}

.hero-text {
    padding-top: 15vh;
    font-family: var(--font-sans-en), var(--font-sans-zh);
    font-size: 0.9rem;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.hero-text hr {
    width: 50px;
    margin: 1rem auto 0;
    border: 0;
    border-top: 1px solid var(--text-primary);
}

/* Section 2: Announcement */
.solid-block {
    background-color: var(--bg-solid);
    padding: 4rem 0;
    position: relative; /* For stacking context */
    z-index: 1;
}

.names {
    font-family: var(--font-serif-en), var(--font-serif-zh);
    font-size: 2.2rem;
    font-weight: 400;
}

.ampersand {
    font-family: var(--font-serif-en);
    font-size: 1.5rem;
    margin: 0.5rem 0;
}

.details {
    margin-top: 2rem;
}

.date-time {
    font-family: var(--font-sans-en), var(--font-sans-zh);
    font-size: 1.1rem;
    line-height: 1.6;
}

.venue {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 1.2rem;
    margin-top: 1rem;
}

.details-separator {
    width: 100px;
    margin: 2rem auto;
    border: 0;
    border-top: 1px solid #ddd;
}

.welcome-message {
    font-family: var(--font-sans-en), var(--font-sans-zh);
    line-height: 1.6;
    font-size: 1rem;
}

.welcome-message p:last-child {
    margin-top: 1rem;
}

/* Section 3: Visual Divider */
#visual-divider.short {
    height: 75vh;
}

.floating-text {
    color: var(--footer-text);
    padding: 1rem 2rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.floating-text p {
    font-family: var(--font-sans-en), var(--font-sans-zh);
    font-size: 1rem;
    line-height: 1.6;
}

/* Section 4: RSVP Intro */
.short-solid {
    padding: 3rem 0;
}

.rsvp-heading {
    font-family: var(--font-serif-en), var(--font-serif-zh);
    font-weight: 400;
    font-size: 2rem;
}

/* Section 5: Call to Action */
#cta .parallax-bg {
    background-color: rgba(58, 51, 44, 0.3); /* Warm overlay */
    background-blend-mode: multiply;
}

.rsvp-button {
    background-color: var(--accent-primary);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-family: var(--font-sans-en), var(--font-sans-zh);
    font-weight: 700;
    letter-spacing: 1.5px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.rsvp-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Section 6: Footer */
#footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 3rem 0;
    text-align: center;
    z-index: 1;
    position: relative;
}

#footer p {
    font-family: var(--font-sans-en), var(--font-sans-zh);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Scroll Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.645, 0.045, 0.355, 1), transform 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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