/* ============================================
   undo.systems — styles.css
   Monochrome + Phosphor Green (#80ffb0)
   ============================================ */

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

:root {
    --void: #0a0a0a;
    --substrate: #0d0d0d;
    --panel: #141414;
    --grid-border: #2a2a2a;
    --crystal-edge: #3a3a3a;
    --text-secondary: #555555;
    --text-tertiary: #707070;
    --text-primary: #b0b0b0;
    --text-display: #e0e0e0;
    --highlight: #f0f0f0;
    --phosphor: #80ffb0;
    --glow: rgba(128, 255, 176, 0.15);
    --glow-strong: rgba(128, 255, 176, 0.5);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--void);
    color: var(--text-primary);
    font-family: 'Work Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.75;
    overflow-x: hidden;
    position: relative;
}

/* --- Typography --- */
.display-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 4.5rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-display);
    text-shadow: 0 0 12px rgba(180, 255, 220, 0.3);
}

.section-marker {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-display);
    text-shadow: 0 0 12px rgba(180, 255, 220, 0.3);
    margin-bottom: 1rem;
}

.body-text {
    font-family: 'Work Sans', sans-serif;
    font-weight: 300;
    color: var(--text-primary);
    max-width: 38ch;
    line-height: 1.75;
}

.mono {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 0.9em;
}

.accent {
    color: var(--phosphor);
}

/* --- Cursor Blink --- */
.cursor {
    color: var(--phosphor);
    animation: cursorBlink 1.06s step-end infinite;
}

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

/* --- Pixel Grid --- */
#pixel-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.6s ease;
    background-image:
        repeating-linear-gradient(to right, var(--grid-border) 0px, var(--grid-border) 1px, transparent 1px, transparent 8px),
        repeating-linear-gradient(to bottom, var(--grid-border) 0px, var(--grid-border) 1px, transparent 1px, transparent 8px);
    background-size: 8px 8px;
}

#pixel-grid.visible {
    opacity: 0.05;
}

/* --- Status Bar --- */
#status-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 40px;
    background: var(--panel);
    border-bottom: 1px solid var(--grid-border);
    z-index: 100;
    display: flex;
    align-items: center;
    padding: 0 16px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

#status-bar.visible {
    opacity: 1;
}

#status-bar-inner {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

#scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: var(--phosphor);
    box-shadow: 0 0 4px var(--phosphor), 0 0 8px var(--glow-strong);
    transition: width 0.1s linear;
}

/* --- Z-Pattern Neon Lines --- */
.z-line {
    position: absolute;
    background: var(--phosphor);
    box-shadow: 0 0 4px var(--phosphor), 0 0 8px rgba(128, 255, 176, 0.5), 0 0 16px rgba(128, 255, 176, 0.2);
    z-index: 1;
    opacity: 0;
    animation: neonPulse 4s ease-in-out infinite;
}

#z-line-top {
    top: 60px;
    left: 5%;
    width: 90%;
    height: 1px;
}

#z-line-diagonal {
    top: 60px;
    right: 5%;
    width: 1px;
    height: 0px;
    transform-origin: top right;
    transform: rotate(30deg);
}

#z-line-bottom {
    bottom: 100vh;
    left: 5%;
    width: 90%;
    height: 1px;
}

.z-line.visible {
    opacity: 0.7;
}

@keyframes neonPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* --- Hero Section --- */
.section-hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 2;
}

#crystal-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#hero-text {
    position: relative;
    z-index: 2;
    text-align: center;
    opacity: 0;
    transition: opacity 1s ease 3.5s;
}

#hero-text.visible {
    opacity: 1;
}

/* --- Memory Section --- */
.section-memory {
    position: relative;
    padding: 80px 0 160px;
    z-index: 2;
    min-height: 200vh;
}

/* Memory Fragments — Z diagonal positioning */
.memory-fragment {
    position: relative;
    margin-bottom: 120px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.memory-fragment.revealed {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
}

.frag-1 {
    margin-left: 55%;
    transform: translateY(30px) rotate(2deg);
}
.frag-1.revealed {
    transform: translateY(0) rotate(2deg);
}

.frag-2 {
    margin-left: 35%;
    transform: translateY(30px) rotate(-1.5deg);
}
.frag-2.revealed {
    transform: translateY(0) rotate(-1.5deg);
}

.frag-3 {
    margin-left: 20%;
    transform: translateY(30px) rotate(3deg);
}
.frag-3.revealed {
    transform: translateY(0) rotate(3deg);
}

.frag-4 {
    margin-left: 10%;
    transform: translateY(30px) rotate(-2deg);
}
.frag-4.revealed {
    transform: translateY(0) rotate(-2deg);
}

/* Crystal Shard Containers */
.shard-container {
    background: linear-gradient(135deg, var(--panel), #1e1e1e);
    padding: 40px 32px;
    max-width: 420px;
    clip-path: polygon(8% 0%, 100% 2%, 96% 85%, 88% 100%, 0% 96%, 3% 12%);
    border: 1px solid var(--crystal-edge);
    position: relative;
    transition: box-shadow 0.3s ease;
}

.shard-container:hover {
    box-shadow: 0 0 20px rgba(128, 255, 176, 0.12);
}

/* System Messages */
.system-message {
    margin: 40px 0;
    padding: 12px 24px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.system-message.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Position system messages along the diagonal */
.memory-fragment:nth-of-type(1) ~ .system-message:nth-of-type(1) {
    margin-left: 50%;
}

.system-message:nth-child(4) { margin-left: 48%; }
.system-message:nth-child(8) { margin-left: 32%; }
.system-message:nth-child(12) { margin-left: 18%; }
.system-message:nth-child(16) { margin-left: 8%; }

/* Shake Animations */
@keyframes shakeLight {
    0%, 100% { transform: translateX(0); }
    12.5% { transform: translateX(-3px); }
    25% { transform: translateX(3px); }
    37.5% { transform: translateX(-3px); }
    50% { transform: translateX(3px); }
    62.5% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
}

@keyframes shakeStrong {
    0%, 100% { transform: translateX(0); }
    8.3% { transform: translateX(-5px); }
    16.6% { transform: translateX(5px); }
    25% { transform: translateX(-5px); }
    33.3% { transform: translateX(5px); }
    41.6% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    58.3% { transform: translateX(-5px); }
    66.6% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
    83.3% { transform: translateX(5px); }
    91.6% { transform: translateX(-5px); }
}

.shake-light {
    animation: shakeLight 0.24s ease-in-out;
}

.shake-strong {
    animation: shakeStrong 0.48s ease-in-out;
}

/* Error flash for system messages */
.error-flash {
    animation: errorFlash 0.2s ease-out;
}

@keyframes errorFlash {
    0% { background-color: #ff4040; opacity: 0.3; }
    100% { background-color: transparent; opacity: 1; }
}

/* Pixel Art Vignettes */
.pixel-vignette {
    width: 128px;
    height: 128px;
    margin: 40px auto;
    opacity: 0;
    image-rendering: pixelated;
    position: relative;
    overflow: hidden;
}

.pixel-vignette.revealed {
    opacity: 1;
}

/* Position vignettes along diagonal */
.pixel-vignette:nth-of-type(1) { margin-left: 52%; }
.pixel-vignette:nth-of-type(2) { margin-left: 28%; }

/* CRT scanline reveal */
.pixel-vignette .scanline-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--void);
    transition: none;
}

/* Pixel art terminal — CSS box-shadow art */
.pixel-art-terminal {
    width: 128px;
    height: 128px;
    position: relative;
    background: var(--void);
}

.pixel-art-terminal::after {
    content: '';
    position: absolute;
    top: 16px;
    left: 16px;
    width: 4px;
    height: 4px;
    background: var(--phosphor);
    box-shadow:
        /* Terminal outline */
        4px 0 0 var(--crystal-edge), 8px 0 0 var(--crystal-edge), 12px 0 0 var(--crystal-edge),
        16px 0 0 var(--crystal-edge), 20px 0 0 var(--crystal-edge), 24px 0 0 var(--crystal-edge),
        28px 0 0 var(--crystal-edge), 32px 0 0 var(--crystal-edge), 36px 0 0 var(--crystal-edge),
        40px 0 0 var(--crystal-edge), 44px 0 0 var(--crystal-edge), 48px 0 0 var(--crystal-edge),
        52px 0 0 var(--crystal-edge), 56px 0 0 var(--crystal-edge), 60px 0 0 var(--crystal-edge),
        64px 0 0 var(--crystal-edge), 68px 0 0 var(--crystal-edge), 72px 0 0 var(--crystal-edge),
        76px 0 0 var(--crystal-edge), 80px 0 0 var(--crystal-edge),
        /* Left edge */
        0 4px 0 var(--crystal-edge), 0 8px 0 var(--crystal-edge), 0 12px 0 var(--crystal-edge),
        0 16px 0 var(--crystal-edge), 0 20px 0 var(--crystal-edge), 0 24px 0 var(--crystal-edge),
        0 28px 0 var(--crystal-edge), 0 32px 0 var(--crystal-edge), 0 36px 0 var(--crystal-edge),
        0 40px 0 var(--crystal-edge), 0 44px 0 var(--crystal-edge), 0 48px 0 var(--crystal-edge),
        0 52px 0 var(--crystal-edge), 0 56px 0 var(--crystal-edge), 0 60px 0 var(--crystal-edge),
        0 64px 0 var(--crystal-edge), 0 68px 0 var(--crystal-edge), 0 72px 0 var(--crystal-edge),
        /* Right edge */
        80px 4px 0 var(--crystal-edge), 80px 8px 0 var(--crystal-edge), 80px 12px 0 var(--crystal-edge),
        80px 16px 0 var(--crystal-edge), 80px 20px 0 var(--crystal-edge), 80px 24px 0 var(--crystal-edge),
        80px 28px 0 var(--crystal-edge), 80px 32px 0 var(--crystal-edge), 80px 36px 0 var(--crystal-edge),
        80px 40px 0 var(--crystal-edge), 80px 44px 0 var(--crystal-edge), 80px 48px 0 var(--crystal-edge),
        80px 52px 0 var(--crystal-edge), 80px 56px 0 var(--crystal-edge), 80px 60px 0 var(--crystal-edge),
        80px 64px 0 var(--crystal-edge), 80px 68px 0 var(--crystal-edge), 80px 72px 0 var(--crystal-edge),
        /* Bottom edge */
        4px 72px 0 var(--crystal-edge), 8px 72px 0 var(--crystal-edge), 12px 72px 0 var(--crystal-edge),
        16px 72px 0 var(--crystal-edge), 20px 72px 0 var(--crystal-edge), 24px 72px 0 var(--crystal-edge),
        28px 72px 0 var(--crystal-edge), 32px 72px 0 var(--crystal-edge), 36px 72px 0 var(--crystal-edge),
        40px 72px 0 var(--crystal-edge), 44px 72px 0 var(--crystal-edge), 48px 72px 0 var(--crystal-edge),
        52px 72px 0 var(--crystal-edge), 56px 72px 0 var(--crystal-edge), 60px 72px 0 var(--crystal-edge),
        64px 72px 0 var(--crystal-edge), 68px 72px 0 var(--crystal-edge), 72px 72px 0 var(--crystal-edge),
        76px 72px 0 var(--crystal-edge),
        /* Cursor line inside terminal */
        8px 12px 0 var(--phosphor), 12px 12px 0 var(--phosphor), 16px 12px 0 var(--phosphor),
        24px 12px 0 var(--phosphor), 28px 12px 0 var(--phosphor), 32px 12px 0 var(--phosphor),
        36px 12px 0 var(--phosphor), 40px 12px 0 var(--phosphor),
        /* Text lines */
        8px 24px 0 var(--text-tertiary), 12px 24px 0 var(--text-tertiary), 16px 24px 0 var(--text-tertiary),
        20px 24px 0 var(--text-tertiary), 24px 24px 0 var(--text-tertiary), 28px 24px 0 var(--text-tertiary),
        36px 24px 0 var(--text-tertiary), 40px 24px 0 var(--text-tertiary), 44px 24px 0 var(--text-tertiary),
        8px 32px 0 var(--text-tertiary), 12px 32px 0 var(--text-tertiary), 16px 32px 0 var(--text-tertiary),
        20px 32px 0 var(--text-tertiary), 24px 32px 0 var(--text-tertiary),
        8px 40px 0 var(--phosphor), 12px 40px 0 var(--phosphor);
}

/* Pixel art crystal */
.pixel-art-crystal {
    width: 128px;
    height: 128px;
    position: relative;
    background: var(--void);
}

.pixel-art-crystal::after {
    content: '';
    position: absolute;
    top: 24px;
    left: 40px;
    width: 4px;
    height: 4px;
    background: var(--crystal-edge);
    box-shadow:
        /* Main crystal body */
        4px 0 0 var(--crystal-edge), 8px 0 0 var(--crystal-edge), 12px 0 0 var(--crystal-edge),
        -4px 4px 0 var(--crystal-edge), 0 4px 0 #1e1e1e, 4px 4px 0 #1e1e1e, 8px 4px 0 #1e1e1e,
        12px 4px 0 #1e1e1e, 16px 4px 0 var(--crystal-edge),
        -8px 8px 0 var(--crystal-edge), -4px 8px 0 #1e1e1e, 0 8px 0 var(--panel), 4px 8px 0 var(--panel),
        8px 8px 0 var(--panel), 12px 8px 0 #1e1e1e, 16px 8px 0 var(--crystal-edge), 20px 8px 0 var(--crystal-edge),
        -8px 12px 0 var(--crystal-edge), -4px 12px 0 #1e1e1e, 0 12px 0 var(--panel), 4px 12px 0 var(--panel),
        8px 12px 0 #1e1e1e, 12px 12px 0 #1e1e1e, 16px 12px 0 var(--crystal-edge), 20px 12px 0 var(--crystal-edge),
        -12px 16px 0 var(--crystal-edge), -8px 16px 0 #1e1e1e, -4px 16px 0 var(--panel), 0 16px 0 var(--panel),
        4px 16px 0 var(--panel), 8px 16px 0 #1e1e1e, 12px 16px 0 var(--crystal-edge),
        16px 16px 0 var(--crystal-edge), 20px 16px 0 var(--phosphor), 24px 16px 0 var(--crystal-edge),
        -12px 20px 0 var(--crystal-edge), -8px 20px 0 #1e1e1e, -4px 20px 0 var(--panel), 0 20px 0 var(--panel),
        4px 20px 0 #1e1e1e, 8px 20px 0 var(--crystal-edge), 12px 20px 0 var(--crystal-edge),
        -12px 24px 0 var(--crystal-edge), -8px 24px 0 var(--crystal-edge), -4px 24px 0 #1e1e1e,
        0 24px 0 #1e1e1e, 4px 24px 0 var(--crystal-edge), 8px 24px 0 var(--crystal-edge),
        -8px 28px 0 var(--crystal-edge), -4px 28px 0 var(--crystal-edge), 0 28px 0 var(--crystal-edge),
        4px 28px 0 var(--crystal-edge),
        /* Small shard offset */
        28px -8px 0 var(--crystal-edge), 32px -8px 0 var(--crystal-edge),
        28px -4px 0 #1e1e1e, 32px -4px 0 var(--crystal-edge), 36px -4px 0 var(--crystal-edge),
        24px 0 0 var(--crystal-edge), 28px 0 0 #1e1e1e, 32px 0 0 #1e1e1e, 36px 0 0 var(--crystal-edge),
        28px 4px 0 var(--crystal-edge), 32px 4px 0 var(--crystal-edge),
        /* Phosphor accents on edges */
        -12px 16px 0 var(--phosphor), 20px 8px 0 var(--phosphor);
}

/* --- Acceptance Section --- */
.section-acceptance {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--substrate);
    z-index: 2;
    overflow: hidden;
}

#acceptance-panel {
    text-align: center;
    width: 0%;
    overflow: hidden;
    white-space: nowrap;
    transition: width 1.5s ease-out;
    padding: 80px 40px;
}

#acceptance-panel.revealed {
    width: 100%;
}

.final-message {
    margin-bottom: 40px;
    white-space: normal;
}

#final-cursor {
    display: inline-block;
}

.final-cursor-char {
    font-size: 2rem;
    transition: color 3s ease;
}

.final-cursor-char.faded {
    color: var(--text-secondary);
    animation: none;
}

/* Crystal formation in acceptance — unbroken */
.crystal-formation-complete {
    width: 200px;
    height: 120px;
    margin: 0 auto 60px;
    position: relative;
    opacity: 0.4;
}

.crystal-formation-complete::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 100px;
    background: linear-gradient(180deg, var(--panel), #1e1e1e);
    clip-path: polygon(30% 0%, 70% 0%, 100% 40%, 85% 100%, 15% 100%, 0% 40%);
    border: 1px solid var(--crystal-edge);
}

.crystal-formation-complete::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 20%;
    width: 40px;
    height: 70px;
    background: linear-gradient(160deg, var(--panel), #1a1a1a);
    clip-path: polygon(40% 0%, 80% 5%, 100% 50%, 70% 100%, 10% 95%, 0% 35%);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .memory-fragment {
        margin-left: 5% !important;
        margin-right: 5%;
    }
    .system-message {
        margin-left: 5% !important;
    }
    .shard-container {
        max-width: 90vw;
    }
    .pixel-vignette {
        margin-left: auto !important;
        margin-right: auto !important;
    }
}