/* ============================================
   opensource.day -- Terminal-to-Generative Dissolve
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --terminal-black: #0B0E11;
    --phosphor-green: #33FF66;
    --diff-addition: #2EA043;
    --diff-deletion: #CF222E;
    --commit-hash: #D4A017;
    --branch-line: #58A6FF;
    --comment-gray: #6E7681;
    --star-gold: #E3B341;
    --scanline-tint: #0D1A0F;

    --font-terminal: 'JetBrains Mono', monospace;
    --font-display: 'Space Grotesk', sans-serif;
    --font-accent: 'Cormorant Garamond', serif;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 18px;
    scroll-behavior: smooth;
    background: var(--terminal-black);
}

body {
    font-family: var(--font-terminal);
    font-size: 1rem;
    line-height: 1.8;
    letter-spacing: 0.02em;
    color: var(--phosphor-green);
    background: var(--terminal-black);
    overflow-x: hidden;
    /* CRT vignette effect */
    background-image: radial-gradient(
        ellipse at center,
        transparent 60%,
        rgba(0, 0, 0, 0.4) 100%
    );
    background-attachment: fixed;
}

/* --- CRT Scanline Overlay --- */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.03) 0px,
        rgba(255, 255, 255, 0.03) 1px,
        transparent 1px,
        transparent 3px
    );
}

/* --- Chamber Base --- */
.chamber {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.chamber-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
}

/* --- 12-Column Grid Gutters (content in cols 2-11) --- */
@media (min-width: 1200px) {
    .chamber-inner {
        max-width: 1100px;
        padding: 0 calc(100% / 12);
    }
}

/* ============================================
   CHAMBER 1: THE PROMPT
   ============================================ */
#chamber-prompt {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--terminal-black);
}

#chamber-prompt .chamber-inner {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.terminal-line {
    font-family: var(--font-terminal);
    font-size: 1.5rem;
    line-height: 1.8;
    color: var(--phosphor-green);
    display: flex;
    align-items: center;
}

.prompt-char {
    color: var(--phosphor-green);
    margin-right: 0.5em;
    font-weight: 700;
}

.typed-text {
    white-space: pre;
    font-feature-settings: "liga" 1, "calt" 1;
}

/* --- Blinking Cursor --- */
.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--phosphor-green);
    margin-left: 1px;
    animation: blink 1.06s step-end infinite;
    vertical-align: text-bottom;
}

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

/* ============================================
   CHAMBER 2: THE LOG
   ============================================ */
#chamber-log {
    min-height: 150vh;
    padding: 8rem 0;
    background: var(--terminal-black);
}

#chamber-log .chamber-inner {
    position: relative;
    padding-left: 5rem;
}

/* --- Commit Graph SVG --- */
.commit-graph {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 100%;
    z-index: 1;
}

.graph-line {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 2s ease-out;
}

.graph-line.revealed {
    stroke-dashoffset: 0;
}

/* Merge glow points */
.merge-glow {
    opacity: 0;
    filter: drop-shadow(0 0 6px var(--branch-line)) drop-shadow(0 0 12px var(--branch-line));
    transition: opacity 0.6s ease;
}

.merge-glow.visible {
    opacity: 1;
    animation: merge-pulse 4s ease-in-out infinite;
}

@keyframes merge-pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* --- Breathing animation for commit graph lines --- */
.graph-line.revealed {
    animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* --- Log Entries --- */
.log-entries {
    position: relative;
    z-index: 2;
}

.log-entry {
    margin-bottom: 3rem;
    padding: 1.5rem;
    border-left: 2px solid var(--branch-line);
    opacity: 0;
    transform: translateX(12px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.log-entry.visible {
    opacity: 1;
    transform: translateX(0);
}

.log-hash {
    font-family: var(--font-terminal);
    font-size: 0.85rem;
    color: var(--commit-hash);
    margin-bottom: 0.3rem;
    letter-spacing: 0.05em;
}

.log-meta {
    font-size: 0.75rem;
    color: var(--comment-gray);
    margin-bottom: 0.6rem;
    display: flex;
    gap: 1.5rem;
}

.log-author {
    color: var(--branch-line);
}

.log-date {
    color: var(--comment-gray);
}

.log-message {
    font-family: var(--font-terminal);
    font-size: 0.95rem;
    color: var(--phosphor-green);
    line-height: 1.8;
}

/* ============================================
   CHAMBER 3: THE DIFF
   ============================================ */
#chamber-diff {
    min-height: 120vh;
    padding: 8rem 0;
    background: var(--terminal-black);
    display: flex;
    align-items: center;
}

.diff-header {
    font-family: var(--font-terminal);
    font-size: 0.85rem;
    color: var(--comment-gray);
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
}

.diff-container {
    display: grid;
    grid-template-columns: 1fr 2px 1fr;
    gap: 1.5rem;
    transition: grid-template-columns 1.2s ease-in-out;
}

.diff-container.merged {
    grid-template-columns: 0fr 0px 1fr;
}

.diff-divider {
    background: var(--comment-gray);
    transition: opacity 1.2s ease-in-out;
}

.diff-container.merged .diff-divider {
    opacity: 0;
}

.diff-col {
    overflow: hidden;
    transition: opacity 1.2s ease-in-out;
}

.diff-deletions {
    color: var(--diff-deletion);
}

.diff-container.merged .diff-deletions {
    opacity: 0;
}

.diff-additions {
    color: var(--diff-addition);
}

.diff-line {
    font-family: var(--font-terminal);
    font-size: 0.9rem;
    line-height: 2;
    padding: 0.1rem 0;
    white-space: nowrap;
}

.diff-prefix {
    display: inline-block;
    width: 1.5em;
    text-align: center;
    font-weight: 700;
    opacity: 0.7;
}

.diff-deletions .diff-line {
    background: rgba(207, 34, 46, 0.08);
    border-left: 3px solid var(--diff-deletion);
    padding-left: 0.5rem;
}

.diff-additions .diff-line {
    background: rgba(46, 160, 67, 0.08);
    border-left: 3px solid var(--diff-addition);
    padding-left: 0.5rem;
}

/* ============================================
   CHAMBER 4: THE TREE
   ============================================ */
#chamber-tree {
    min-height: 150vh;
    padding: 4rem 0;
    background: var(--terminal-black);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

#chamber-tree .chamber-inner {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tree-prompt {
    font-family: var(--font-terminal);
    font-size: 1.1rem;
    color: var(--phosphor-green);
    margin-bottom: 2rem;
    text-align: left;
    width: 100%;
}

.lsystem-tree {
    width: 80vw;
    max-width: 800px;
    height: 600px;
}

.lsystem-tree line {
    stroke-linecap: round;
}

/* Leaf node spring animation */
@keyframes spring {
    0% { transform: scale(0); }
    60% { transform: scale(1.2); }
    80% { transform: scale(0.9); }
    100% { transform: scale(1); }
}

.tree-leaf {
    animation: spring 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* ============================================
   CHAMBER 5: THE FORK
   ============================================ */
#chamber-fork {
    min-height: 100vh;
    background: var(--terminal-black);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

#chamber-fork .chamber-inner {
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 2;
}

.fork-content {
    position: relative;
}

.fork-prompt {
    font-family: var(--font-terminal);
    font-size: 1.2rem;
    color: var(--phosphor-green);
    margin-bottom: 2rem;
}

.fork-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 15vw;
    letter-spacing: -0.03em;
    color: var(--phosphor-green);
    line-height: 1;
    transition: transform 1.2s ease-in-out;
}

.fork-top,
.fork-bottom {
    transition: transform 1.2s ease-in-out;
    will-change: transform;
}

.fork-content.split .fork-top {
    transform: translateY(-4vh);
}

.fork-content.split .fork-bottom {
    transform: translateY(4vh);
}

.fork-gap {
    height: 0;
    overflow: hidden;
    background: var(--star-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: height 1.2s ease-in-out;
    will-change: height;
}

.fork-content.split .fork-gap {
    height: 8vh;
    animation: gold-pulse 3s ease-in-out infinite;
}

@keyframes gold-pulse {
    0%, 100% { filter: brightness(0.9); }
    50% { filter: brightness(1.0); }
}

.fork-quote {
    font-family: var(--font-accent);
    font-weight: 300;
    font-style: italic;
    font-size: 3vw;
    color: var(--terminal-black);
    padding: 0 2rem;
    opacity: 0;
    transition: opacity 0.8s ease 0.4s;
    white-space: nowrap;
}

.fork-content.split .fork-quote {
    opacity: 1;
}

/* --- Character Particle Field --- */
.particle-field {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.particle {
    position: absolute;
    font-family: var(--font-terminal);
    font-size: 1.2rem;
    opacity: 0;
    will-change: transform;
    transition: opacity 1s ease;
}

.particle.active {
    opacity: 0.4;
    animation: drift var(--drift-duration, 15s) cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
}

@keyframes drift {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(var(--dx1, 30px), var(--dy1, -20px)) rotate(90deg);
    }
    50% {
        transform: translate(var(--dx2, -15px), var(--dy2, 40px)) rotate(180deg);
    }
    75% {
        transform: translate(var(--dx3, 25px), var(--dy3, -10px)) rotate(270deg);
    }
    100% {
        transform: translate(0, 0) rotate(360deg);
    }
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }

    .terminal-line {
        font-size: 1.2rem;
    }

    .fork-title {
        font-size: 12vw;
    }

    .fork-quote {
        font-size: 4vw;
        white-space: normal;
    }

    .diff-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .diff-divider {
        display: none;
    }

    .diff-deletions {
        order: 1;
    }

    .diff-additions {
        order: 2;
    }

    #chamber-log .chamber-inner {
        padding-left: 3.5rem;
    }

    .commit-graph {
        width: 40px;
    }
}

@media (max-width: 480px) {
    .fork-quote {
        font-size: 5vw;
    }

    .log-entry {
        padding: 1rem;
    }

    .log-meta {
        flex-direction: column;
        gap: 0.3rem;
    }
}

/* --- Selection Color --- */
::selection {
    background: var(--branch-line);
    color: var(--terminal-black);
}