@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

:root {
    --color-bg-dark: #030712;
    --color-bg-primary: #111827;
    --color-bg-secondary: #1F2937;
    --color-text-primary: #F9FAFB;
    --color-text-secondary: #D1D5DB;
    --color-accent: #3B82F6;
    --color-accent-hover: #2563EB;
}

body {
    font-family: 'Pretendard', sans-serif;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-dark);
}

html {
    scroll-behavior: smooth;
}

#header {
    background-color: transparent;
}

#header.scrolled {
    background-color: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

.nav-link.active {
    color: var(--color-accent);
    font-weight: 600;
}

.section-title {
    font-size: 2.25rem;
    line-height: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    position: relative;
    padding-bottom: 0.75rem;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.font-cinzel {
    font-family: 'Cinzel Decorative', serif;
}

body.poster-detail-body,
body.speaker-detail-body {
    background-image: url('https://r2.flowith.net/files/11232ec1-f84c-415c-b19c-9744f8097a44/1753119993926-2@4x@1371x2000.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

/* Keyframe Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translate3d(0, -50px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 50px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes popup-fade-in-up {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.popup-animate {
    animation: popup-fade-in-up 0.4s ease-out forwards;
}

.animate-fade-in-down {
    animation: fadeInDown 1s ease-out forwards;
}

.animate-fade-in-up {
    animation: fadeInUp 1s ease-out forwards;
    opacity: 0; /* Start hidden */
}

/* Program Timeline */
.timeline-item {
    position: relative;
    padding: 2rem 0;
    padding-left: 2.5rem;
    border-left: 2px solid #374151;
}
.timeline-item:last-child {
    border-image: linear-gradient(to bottom, #374151, transparent) 1 100%;
}

.timeline-dot {
    position: absolute;
    left: -0.7rem;
    top: 2rem;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 9999px;
    background-color: #1F2937;
    border: 3px solid var(--color-accent);
}

.timeline-time {
    position: absolute;
    left: -6rem;
    top: 2rem;
    width: 5rem;
    text-align: right;
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* Specific prize image scaling */
#popup-image[src=\\\"https://i.ibb.co/x86BRjM7/image.png\\\"],
#popup-image[src=\\\"https://i.ibb.co/PzfsRPMQ/image.png\\\"] {
    transform: scale(1.3);
}

/* Responsive Backgrounds */
@media (min-width: 768px) {
    body:not(.ebook-body) {
        background-image: url('https://r2.flowith.net/files/11232ec1-f84c-415c-b19c-9744f8097a44/1753119993926-2@4x@1371x2000.png');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        background-attachment: fixed;
    }
}

@media (max-width: 767px) {
    #home {
        background-image: url('https://r2.flowith.net/files/11232ec1-f84c-415c-b19c-9744f8097a44/1753119993926-2@4x@1371x2000.png');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }

    main > section:not(#home), #footer {
        background-color: var(--color-bg-dark) !important;
    }

    .timeline-item {
        padding-left: 1.5rem;
    }
    .timeline-time {
        position: static;
        width: auto;
        text-align: left;
        margin-bottom: 0.5rem;
        font-size: 0.875rem;
        color: #9CA3AF;
    }
    .timeline-dot {
        left: -0.6rem;
    }
}

/* Footer Decorations */
@keyframes fly-left {
    0% {
        left: -10%;
        opacity: 0;
    }
    10%, 90% {
        opacity: 1;
    }
    100% {
        left: 110%;
        opacity: 0;
    }
}

@keyframes fly-right {
    0% {
        right: -10%;
        opacity: 0;
    }
    10%, 90% {
        opacity: 1;
    }
    100% {
        right: 110%;
        opacity: 0;
    }
}

.bullet {
    position: absolute;
    width: 12px;
    height: 4px;
    background: #c0c0c0; /* silver */
    border-radius: 50px;
    box-shadow: 0 0 5px #d1d5db, 0 0 10px #d1d5db; /* silver glow */
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    opacity: 0;
}

.bullet::after {
    content: '';
    position: absolute;
    right: 8px; /* start trail just behind the bullet head */
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 2px;
    background: linear-gradient(to right, transparent, #c0c0c0); /* silver */
    border-radius: 2px;
}

.bullet.from-left {
    animation-name: fly-left;
}

.bullet.from-right {
    transform: scaleX(-1); /* Flips bullet and its ::after pseudo-element */
    animation-name: fly-right;
}

/* E-book Styles */
body.ebook-body {
    background-color: #374151; /* gray-700 */
}

.ebook-main {
    padding-top: 5rem;
    padding-bottom: 1rem;
}

.ebook-page {
    width: 21cm;
    min-height: 29.7cm;
    padding: 2cm;
    margin: 0 auto 2rem auto;
    background: white;
    color: black;
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    box-sizing: border-box;
    page-break-after: always;
    display: flex;
    flex-direction: column;
}

.ebook-page h1, .ebook-page h2, .ebook-page h3, .ebook-page h4, .ebook-page h5, .ebook-page h6 {
    font-family: 'Pretendard', sans-serif;
    color: #111827; /* gray-900 */
}

@media print {
    .no-print {
        display: none !important;
    }
    body.ebook-body {
        background-color: white;
    }
    .ebook-main {
        padding: 0;
        margin: 0;
    }
    .ebook-page {
        width: 100%;
        min-height: 100%;
        height: 100vh;
        margin: 0;
        padding: 1.5cm;
        box-shadow: none;
    }
}