:root {
    --primary-color: #a78e6c;
    --secondary-color: #463c2b;
    --background-color: #f6f2ea;
    --text-color: #463c2b;
    --font-serif: 'Lora', Georgia, serif;
    --font-sans: 'Lora', Georgia, serif;
    --dusk-progress: 0;
    --night-progress: 0;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    overflow-x: clip;
}

.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at center, transparent 0%, rgba(212, 175, 55, calc(0.03 + 0.02 * var(--dusk-progress))) 100%),
        linear-gradient(rgba(15, 20, 35, calc(0.26 * var(--night-progress))), rgba(15, 20, 35, calc(0.26 * var(--night-progress)))),
        linear-gradient(
            180deg,
            rgba(255, 255, 255, calc(0.14 - 0.12 * var(--night-progress))) 0%,
            rgba(210, 130, 86, calc(0.06 + 0.2 * var(--dusk-progress))) 45%,
            rgba(24, 31, 54, calc(0.08 + 0.62 * var(--night-progress))) 100%
        );
    pointer-events: none;
    z-index: 1;
}

.guestbook-intro {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 80px 20px;
    background-color: rgba(255, 255, 255, calc(0.92 - 0.18 * var(--night-progress)));
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.03);
    margin-bottom: 60px;
}

.logo {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    letter-spacing: 5px;
}

h1 {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    margin: 0;
    font-weight: 400;
    color: var(--secondary-color);
}

.subtitle {
    font-family: var(--font-sans);
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9rem;
    margin-bottom: 40px;
    color: #888;
}

.main-btn {
    padding: 15px 40px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.main-btn:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

.timeline-container {
    position: relative;
    z-index: 2;
    width: 90%;
    max-width: 900px;
    margin: 0 auto 100px;
    padding: 20px 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--primary-color), transparent);
    z-index: 1;
}

.timeline-play-progress {
    position: absolute;
    left: 50%;
    top: 0;
    width: 3px;
    height: 0;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, #f0d77a, var(--primary-color));
    border-radius: 999px;
    box-shadow: 0 0 12px rgba(212, 175, 55, 0.55);
    opacity: 0;
    z-index: 3;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.entries-container {
    position: relative;
    z-index: 2;
}

.entry {
    display: flex;
    align-items: center;
    margin-bottom: 80px;
    width: 100%;
}

.entry:nth-child(odd) {
    flex-direction: row-reverse;
}

.entry-content {
    width: 42%;
    background: rgba(255, 255, 255, calc(0.94 - 0.16 * var(--night-progress)));
    backdrop-filter: blur(6px);
    padding: 30px;
    border-radius: 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    transition: transform 0.3s ease;
}

.entry-content:hover {
    transform: translateY(-5px);
}

.entry-time {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.entry-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin-bottom: 25px;
    border: 1px solid var(--primary-color);
    padding: 5px;
    background: linear-gradient(135deg, #ffffff 0%, #f6efe1 100%);
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 3rem;
    overflow: hidden;
    position: relative;
}

.entry-avatar img,
.entry-avatar-stack {
    width: 100%;
    height: 100%;
}

.entry-avatar img {
    border-radius: 50%;
    object-fit: cover;
}

.entry-avatar.has-image .entry-avatar-fallback {
    display: none;
}

.entry-avatar-image + .entry-avatar-stack {
    display: none;
}

.entry-avatar-stack {
    display: grid;
    gap: 0;
    overflow: hidden;
    border-radius: 50%;
}

.entry-avatar-stack-1 {
    grid-template-columns: 1fr;
}

.entry-avatar-stack-2 {
    grid-template-columns: repeat(2, 1fr);
}

.entry-avatar-stack-3 {
    grid-template-columns: 1.15fr 0.85fr;
    grid-template-rows: repeat(2, 1fr);
}

.entry-avatar-stack-4 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

.entry-avatar-stack-3 img:first-child {
    grid-row: 1 / span 2;
}

.entry-avatar-stack img {
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    border-radius: 0;
    object-fit: cover;
}

.entry-speaker {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.play-entry-btn {
    padding: 10px 25px;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    background-color: transparent;
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
    transition: all 0.3s ease;
}

.play-entry-btn:hover {
    background-color: var(--secondary-color);
    color: white;
}

.entry-comment {
    width: 100%;
    white-space: pre-line;
    max-height: 0;
    margin-top: 0;
    padding: 0 16px;
    overflow: hidden;
    opacity: 0;
    border-left: 2px solid var(--primary-color);
    color: var(--secondary-color);
    font-family: var(--font-serif);
    font-size: 1.15rem;
    line-height: 1.4;
    text-align: left;
    transition: max-height 0.3s ease, margin-top 0.3s ease, opacity 0.25s ease, padding-top 0.3s ease, padding-bottom 0.3s ease;
}

.entry-comment.visible {
    max-height: 180px;
    margin-top: 22px;
    padding-top: 12px;
    padding-bottom: 12px;
    opacity: 1;
}

.entry-dot {
    width: 10px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    box-shadow:
        0 0 0 5px rgba(255, 255, 255, calc(0.92 - 0.16 * var(--night-progress))),
        0 0 0 6px var(--primary-color);
}

.playing {
    border-color: var(--primary-color) !important;
    background-color: rgba(212, 175, 55, 0.05) !important;
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.2) !important;
}

.playing .entry-avatar {
    animation: pulse 2s infinite;
}

.status-message {
    text-align: center;
    color: var(--secondary-color);
    background: rgba(255, 255, 255, calc(0.94 - 0.16 * var(--night-progress)));
    backdrop-filter: blur(6px);
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.4); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(212, 175, 55, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

@media (max-width: 768px) {
    .timeline-line {
        left: 30px;
    }

    .timeline-play-progress {
        left: 30px;
    }
    
    .entry {
        flex-direction: row !important;
        padding-left: 60px;
    }
    
    .entry-content {
        width: 100%;
    }
    
    .entry-dot {
        left: 30px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
}