/* undo.cafe - Horizontal Undo Cafe */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --neon-green: #00FF80;
    --alert-red: #FF0040;
    --light-gray: #F0F0F0;
    --cyan: #60C0E0;
    --mid-gray: #B0B0B0;
    --void: #0A0A0A;
    --off-white: #F5F5F5;
    --cafe-orange: #F09040;
    --cyan-alt: #00D0E0;
    --magenta: #E000A0;
}

body {
    background: var(--void);
    color: var(--light-gray);
    font-family: 'Manrope', sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    font-weight: 400;
    overflow: hidden;
    height: 100vh;
}

/* Horizontal Scroll Track */
.scroll-track {
    display: flex;
    flex-direction: row;
    height: 100vh;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
}
.scroll-track::-webkit-scrollbar { display: none; }

/* Panels */
.panel {
    width: 100vw;
    min-height: 100vh;
    flex-shrink: 0;
    scroll-snap-align: start;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.panel-dark { background: var(--void); }
.panel-light { background: var(--off-white); }

/* Glitch Flash */
.glitch-flash {
    position: absolute;
    inset: 0;
    background: var(--light-gray);
    opacity: 0;
    pointer-events: none;
    z-index: 10;
}
.glitch-flash.active {
    animation: flash 0.15s ease;
}
@keyframes flash {
    0% { opacity: 0.8; }
    100% { opacity: 0; }
}

/* Panel Content */
.panel-content {
    max-width: 480px;
    padding: 2rem;
    position: relative;
    z-index: 2;
}
.panel-content.center { text-align: center; }

/* Title */
.cafe-title {
    font-family: 'Manrope', sans-serif;
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    color: var(--cyan-alt);
    margin-bottom: 0.5rem;
}
.cafe-sub {
    font-family: 'Manrope', sans-serif;
    font-size: 1.125rem;
    color: var(--mid-gray);
    margin-bottom: 1.5rem;
}
.cafe-code {
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    color: var(--neon-green);
}
.dark-code { color: var(--void); }

/* Scroll Hint */
.scroll-hint {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    animation: pulseRight 1.5s ease-in-out infinite;
}
.hint-arrow {
    font-size: 2rem;
    color: var(--mid-gray);
}
@keyframes pulseRight {
    0%, 100% { transform: translateX(0); opacity: 0.5; }
    50% { transform: translateX(10px); opacity: 1; }
}

/* Panel Labels */
.panel-label {
    font-family: 'Fira Code', monospace;
    font-size: 0.75rem;
    color: var(--cyan);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.75rem;
}

/* Panel Headings */
.panel-heading {
    font-family: 'Manrope', sans-serif;
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    color: var(--light-gray);
    margin-bottom: 1rem;
}
.dark-text { color: var(--void); }

/* Panel Body */
.panel-body {
    font-family: 'Manrope', sans-serif;
    font-size: 1rem;
    color: var(--mid-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}
.dark-body { color: #555; }

/* Code Snippets */
.code-snippet {
    background: rgba(0, 255, 128, 0.05);
    border: 1px solid rgba(0, 255, 128, 0.15);
    border-radius: 6px;
    padding: 1rem;
}
.dark-snippet {
    background: rgba(10, 10, 10, 0.05);
    border-color: rgba(10, 10, 10, 0.15);
}
.code-snippet code {
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    color: var(--neon-green);
    display: block;
    line-height: 1.8;
}
.dark-snippet code { color: var(--void); }
.code-comment { color: var(--mid-gray); }
.code-error { color: var(--alert-red); }

/* Fish Layer */
.fish-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 3;
    overflow: hidden;
}

/* Glitch Edge Effect */
.panel::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: repeating-linear-gradient(
        180deg,
        transparent,
        transparent 4px,
        var(--neon-green) 4px,
        var(--neon-green) 6px,
        transparent 6px,
        transparent 10px
    );
    opacity: 0.15;
}

/* Responsive */
@media (max-width: 768px) {
    .panel-content { max-width: 90%; }
}