/* ============================================================
   yesan.xyz // BUDGET OBSERVATORY
   Brutalist HUD-overlay aesthetic
   Fonts: Archivo Black, Space Grotesk" (Google Fonts), JetBrains Mono" (Google Fonts)
   Implementation notes: IntersectionObserver. The organic shape has its own
   internal SVG growth animation that starts once revealed.
   ============================================================ */

:root {
    --concrete: #3a3a3a;
    --steel: #6a6a6a;
    --ash: #d4d4d4;
    --cyan: #00cccc;
    --amber: #ccaa00;
    --moss: #4a7a4a;
    --void: #1a1a1a;

    --hud-font: 'Archivo Black', 'Inter', sans-serif;
    --body-font: 'Space Grotesk', 'Inter', sans-serif;
    --mono-font: 'JetBrains Mono', monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    background: var(--void);
    color: var(--ash);
    font-family: var(--body-font);
    font-size: 16px;
    line-height: 1.65;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Concrete background texture */
.concrete-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    background-color: var(--concrete);
    background-image:
        repeating-linear-gradient(
            45deg,
            rgba(0, 0, 0, 0.06) 0px,
            rgba(0, 0, 0, 0.06) 1px,
            transparent 1px,
            transparent 4px
        ),
        repeating-linear-gradient(
            -45deg,
            rgba(255, 255, 255, 0.025) 0px,
            rgba(255, 255, 255, 0.025) 1px,
            transparent 1px,
            transparent 7px
        ),
        radial-gradient(circle at 20% 30%, rgba(0, 0, 0, 0.18) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 0, 0, 0.22) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 60%);
    background-size: auto, auto, 800px 800px, 1000px 1000px, 100% 100%;
    pointer-events: none;
}

/* Scanning line */
.scan-line {
    position: fixed;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    overflow: hidden;
}
.scan-line::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(0, 204, 204, 0.4) 50%,
        transparent 100%
    );
    box-shadow: 0 0 8px rgba(0, 204, 204, 0.3);
    animation: scan 15s linear infinite;
}
@keyframes scan {
    0% { transform: translateY(-10vh); }
    100% { transform: translateY(110vh); }
}

/* HUD frame */
.hud-frame {
    position: fixed;
    inset: 0;
    z-index: 100;
    pointer-events: none;
}

.bracket {
    position: fixed;
    width: 60px;
    height: 60px;
    opacity: 0;
    animation: bracket-in 0.4s ease-out forwards;
}
.bracket-tl { top: 16px; left: 16px; animation-delay: 0.2s; }
.bracket-tr { top: 16px; right: 16px; animation-delay: 0.35s; }
.bracket-bl { bottom: 16px; left: 16px; animation-delay: 0.5s; }
.bracket-br { bottom: 16px; right: 16px; animation-delay: 0.65s; }

@keyframes bracket-in {
    0% { opacity: 0; transform: scale(1.4); }
    60% { opacity: 1; }
    100% { opacity: 1; transform: scale(1); }
}

/* HUD top bar */
.hud-top {
    position: fixed;
    top: 20px;
    left: 90px;
    right: 90px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 24px;
    padding: 8px 16px;
    border-bottom: 1px solid rgba(0, 204, 204, 0.4);
    font-family: var(--mono-font);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--cyan);
    text-transform: uppercase;
    opacity: 0;
    animation: fade-in 0.4s ease-out 1s forwards;
}

.hud-title {
    font-family: var(--hud-font);
    font-size: 0.95rem;
    color: var(--ash);
    letter-spacing: 0.1em;
    white-space: nowrap;
    overflow: hidden;
}

.hud-section {
    text-align: center;
    color: var(--cyan);
}

.hud-time {
    text-align: right;
    color: var(--cyan);
}

.hud-bottom {
    position: fixed;
    bottom: 20px;
    left: 90px;
    right: 90px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
    padding: 8px 16px;
    border-top: 1px solid rgba(0, 204, 204, 0.4);
    font-family: var(--mono-font);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--cyan);
    text-transform: uppercase;
    opacity: 0;
    animation: fade-in 0.4s ease-out 1.4s forwards;
}

.hud-bottom .hud-status {
    text-align: center;
}
.hud-bottom .hud-scroll {
    text-align: right;
}

.signal-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cyan);
    margin: 0 6px;
    box-shadow: 0 0 6px var(--cyan);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Reticle - follows scroll */
.reticle {
    position: fixed;
    width: 80px;
    height: 80px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0;
    animation: fade-in 0.5s ease-out 2s forwards;
    transition: top 0.3s ease, left 0.3s ease;
    mix-blend-mode: screen;
}
.reticle svg {
    width: 100%;
    height: 100%;
}

/* Boot overlay */
.boot-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--void);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 80px;
    font-family: var(--mono-font);
    color: var(--cyan);
    font-size: 0.9rem;
    transition: opacity 0.6s ease;
}
.boot-overlay.done {
    opacity: 0;
    pointer-events: none;
}
.boot-text {
    font-family: var(--hud-font);
    font-size: 2.5rem;
    letter-spacing: 0.04em;
    color: var(--ash);
    margin-bottom: 32px;
    min-height: 3rem;
    border-right: 4px solid var(--cyan);
    padding-right: 8px;
    animation: caret 0.8s steps(2) infinite;
}
@keyframes caret {
    0%, 49% { border-color: var(--cyan); }
    50%, 100% { border-color: transparent; }
}
.boot-line {
    opacity: 0;
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}
.boot-line.show {
    animation: flicker-in 0.4s steps(6) forwards;
}
@keyframes flicker-in {
    0% { opacity: 0; }
    20% { opacity: 1; }
    35% { opacity: 0; }
    50% { opacity: 1; }
    70% { opacity: 0; }
    100% { opacity: 1; }
}

/* Content */
.content {
    position: relative;
    z-index: 10;
    padding: 110px 110px 110px 110px;
    max-width: 100vw;
}

.section {
    position: relative;
    min-height: 100vh;
    padding: 60px 0;
    display: grid;
    gap: 24px;
}

/* Panels */
.panel {
    position: relative;
    background: rgba(26, 26, 26, 0.85);
    border: 1px solid rgba(0, 204, 204, 0.4);
    padding: 24px 28px;
    backdrop-filter: blur(2px);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.panel.visible {
    opacity: 1;
    transform: translateY(0);
}
.panel.flicker {
    animation: panel-flicker 0.3s steps(6) forwards;
}
@keyframes panel-flicker {
    0% { opacity: 0; }
    16% { opacity: 1; }
    32% { opacity: 0; }
    48% { opacity: 1; }
    66% { opacity: 0; }
    82% { opacity: 1; }
    100% { opacity: 1; }
}

.panel::before {
    content: "";
    position: absolute;
    top: 8px;
    right: 8px;
    width: 6px;
    height: 6px;
    background: var(--cyan);
    box-shadow: 0 0 6px var(--cyan);
    animation: pulse 2s ease-in-out infinite;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-bottom: 12px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(0, 204, 204, 0.25);
    font-family: var(--mono-font);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--cyan);
}
.panel-id {
    color: var(--ash);
    font-weight: 700;
}
.panel-label {
    flex: 1;
    color: var(--steel);
}
.panel-status {
    color: var(--cyan);
    padding: 2px 8px;
    border: 1px solid rgba(0, 204, 204, 0.5);
}
.panel-status.warn {
    color: var(--amber);
    border-color: rgba(204, 170, 0, 0.5);
}
.panel-status.alert {
    color: var(--amber);
    border-color: var(--amber);
    animation: alert-blink 1s steps(2) infinite;
}
@keyframes alert-blink {
    0%, 100% { background: transparent; }
    50% { background: rgba(204, 170, 0, 0.2); }
}

/* HERO */
.hero {
    grid-template-columns: 1.6fr 1fr;
    grid-template-rows: auto auto;
    gap: 24px;
    align-items: start;
    min-height: 110vh;
}

.panel-hero {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
}

.panel-radar {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
    position: relative;
    transform: translateY(40px);
}

.hero-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    font-family: var(--mono-font);
    font-size: 0.75rem;
    color: var(--cyan);
    letter-spacing: 0.06em;
}
.meta-line {
    padding-left: 10px;
    border-left: 2px solid var(--cyan);
}

.hero-title {
    font-family: var(--hud-font);
    font-size: clamp(3.5rem, 9vw, 9rem);
    line-height: 0.92;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ash);
    margin-bottom: 28px;
}
.hero-line {
    display: block;
    position: relative;
}
.hero-line:nth-child(2) {
    color: var(--cyan);
    margin-left: 0.6em;
}

.hero-subtitle {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--ash);
    max-width: 540px;
    margin-bottom: 28px;
}

.hero-readout {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    font-family: var(--mono-font);
    font-size: 0.8rem;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 204, 204, 0.2);
}
.readout-label {
    color: var(--steel);
    letter-spacing: 0.08em;
}
.readout-value {
    color: var(--cyan);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.hero-bignum {
    grid-column: 1 / 3;
    grid-row: 2 / 3;
    font-family: var(--hud-font);
    font-size: 16vw;
    line-height: 0.85;
    letter-spacing: 0.04em;
    color: rgba(0, 204, 204, 0.18);
    text-align: right;
    pointer-events: none;
    user-select: none;
    margin-top: -20px;
}

/* Radar */
.radar {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border: 1px solid rgba(0, 204, 204, 0.4);
    border-radius: 50%;
    overflow: hidden;
    background: radial-gradient(circle, rgba(0, 204, 204, 0.06), transparent 70%);
    margin-bottom: 16px;
}
.radar-sweep {
    position: absolute;
    inset: 0;
    background: conic-gradient(
        from 0deg,
        rgba(0, 204, 204, 0.55) 0deg,
        rgba(0, 204, 204, 0.18) 30deg,
        transparent 80deg,
        transparent 360deg
    );
    border-radius: 50%;
    animation: radar-spin 4s linear infinite;
}
@keyframes radar-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.radar-grid {
    position: absolute;
    inset: 0;
    border-radius: 50%;
}
.radar-ring {
    position: absolute;
    border: 1px solid rgba(0, 204, 204, 0.3);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.radar-ring.r1 { width: 90%; height: 90%; }
.radar-ring.r2 { width: 60%; height: 60%; }
.radar-ring.r3 { width: 30%; height: 30%; }
.radar-cross {
    position: absolute;
    background: rgba(0, 204, 204, 0.25);
}
.radar-cross.h { left: 0; right: 0; top: 50%; height: 1px; }
.radar-cross.v { top: 0; bottom: 0; left: 50%; width: 1px; }

.radar-blip {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--cyan);
    border-radius: 50%;
    left: var(--x);
    top: var(--y);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 8px var(--cyan);
    animation: blip 4s ease-out infinite;
    animation-delay: var(--d);
}
@keyframes blip {
    0% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.3; transform: translate(-50%, -50%) scale(2.5); }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(3); }
}

.readout-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 16px;
    font-family: var(--mono-font);
    font-size: 0.72rem;
    letter-spacing: 0.05em;
}
.readout-grid .rk { color: var(--steel); margin-right: 6px; }
.readout-grid .rv { color: var(--cyan); font-weight: 700; }

/* Data section */
.data-section {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
}

.section-title {
    font-family: var(--hud-font);
    font-size: clamp(2.5rem, 6vw, 5rem);
    line-height: 0.92;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ash);
    margin-bottom: 24px;
}

.body-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--ash);
    max-width: 600px;
    margin-bottom: 28px;
}
.body-text.large {
    font-size: 1.4rem;
    font-weight: 400;
    line-height: 1.45;
    color: var(--ash);
    font-style: italic;
}

.data-rows {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.data-row {
    display: grid;
    grid-template-columns: 60px 180px 1fr 70px;
    gap: 16px;
    align-items: center;
    font-family: var(--mono-font);
    font-size: 0.8rem;
    padding: 8px 0;
    border-bottom: 1px dashed rgba(0, 204, 204, 0.15);
}
.dr-code { color: var(--steel); letter-spacing: 0.08em; }
.dr-label { color: var(--ash); letter-spacing: 0.05em; text-transform: uppercase; }
.dr-bar {
    height: 8px;
    background: rgba(0, 204, 204, 0.1);
    border: 1px solid rgba(0, 204, 204, 0.3);
    position: relative;
    overflow: hidden;
}
.dr-fill {
    display: block;
    height: 100%;
    width: 0;
    background: var(--cyan);
    box-shadow: 0 0 6px rgba(0, 204, 204, 0.5);
    transition: width 1.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.dr-fill.amber { background: var(--amber); box-shadow: 0 0 6px rgba(204, 170, 0, 0.5); }
.panel.visible .dr-fill { width: var(--w); }
.dr-val { color: var(--cyan); font-weight: 700; text-align: right; }
.dr-val.amber { color: var(--amber); }

/* Waveform */
.panel-waveform {
    transform: translateY(60px);
}
.waveform {
    width: 100%;
    height: 120px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 204, 204, 0.2);
    margin-bottom: 16px;
}
.readout-row {
    font-family: var(--mono-font);
    font-size: 0.78rem;
    display: flex;
    gap: 18px;
}
.readout-row .rk { color: var(--steel); margin-right: 4px; }
.readout-row .rv { color: var(--cyan); font-weight: 700; margin-right: 12px; }

/* Breakthrough sections */
.breakthrough {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 40px;
}

.crack-zone {
    position: relative;
    width: 100%;
    height: 480px;
    overflow: hidden;
    border: 1px solid rgba(0, 204, 204, 0.3);
    background: var(--void);
}

.crack-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    clip-path: polygon(48% 0%, 52% 0%, 52% 100%, 48% 100%);
    transition: clip-path 0.9s cubic-bezier(0.65, 0, 0.35, 1);
}
.crack-zone.revealed .crack-svg {
    clip-path: polygon(0% 0%, 100% 0%, 100% 100%, 0% 100%);
}

.leaf-vein {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    transition: stroke-dashoffset 1.6s ease 0.4s;
}
.crack-zone.revealed .leaf-vein {
    stroke-dashoffset: 0;
}

.root-path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    transition: stroke-dashoffset 2s ease 0.3s;
}
.crack-zone.revealed .root-path {
    stroke-dashoffset: 0;
}

.anomaly-tag {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(26, 26, 26, 0.92);
    border: 1px solid var(--amber);
    padding: 8px 14px;
    font-family: var(--mono-font);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--amber);
    text-transform: uppercase;
    z-index: 5;
}
.tag-code {
    color: var(--amber);
    font-weight: 700;
    margin-bottom: 4px;
}
.tag-name {
    color: var(--ash);
    margin-bottom: 4px;
}
.tag-meta {
    color: var(--steel);
    font-size: 0.65rem;
}

.panel-anomaly, .panel-medium {
    align-self: center;
}

.log-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-family: var(--mono-font);
    font-size: 0.78rem;
}
.log-item {
    display: grid;
    grid-template-columns: 80px 130px 1fr;
    gap: 12px;
    padding: 6px 0;
    border-bottom: 1px dashed rgba(0, 204, 204, 0.1);
}
.log-t { color: var(--steel); }
.log-c { color: var(--amber); font-weight: 700; }
.log-m { color: var(--ash); }

.signature {
    font-family: var(--mono-font);
    font-size: 0.78rem;
    color: var(--cyan);
    letter-spacing: 0.08em;
    margin-top: 16px;
}

/* Vitals */
.vitals {
    grid-template-columns: 1fr;
}
.panel-vitals {
    width: 100%;
}
.heartbeat-wrap {
    position: relative;
    background: var(--void);
    border: 1px solid rgba(0, 204, 204, 0.2);
    padding: 8px;
    margin: 24px 0;
    overflow: hidden;
}
.heartbeat {
    width: 100%;
    height: 120px;
    display: block;
}
.heartbeat-line {
    filter: drop-shadow(0 0 4px rgba(0, 204, 204, 0.4));
}
.heartbeat-cursor {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1.5px;
    background: var(--cyan);
    box-shadow: 0 0 8px var(--cyan);
    animation: heartbeat-trace 20s linear infinite;
}
@keyframes heartbeat-trace {
    from { left: 0%; }
    to { left: 100%; }
}

.vitals-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.vital {
    border: 1px solid rgba(0, 204, 204, 0.3);
    padding: 16px 18px;
    background: rgba(0, 0, 0, 0.2);
}
.vital-k {
    font-family: var(--mono-font);
    font-size: 0.7rem;
    color: var(--steel);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}
.vital-v {
    font-family: var(--hud-font);
    font-size: 2.2rem;
    color: var(--cyan);
    line-height: 1;
    letter-spacing: 0.04em;
}
.vital-u {
    font-family: var(--mono-font);
    font-size: 0.7rem;
    color: var(--steel);
    letter-spacing: 0.08em;
    margin-top: 4px;
}

/* Archive */
.archive {
    grid-template-columns: 1fr;
}
.archive-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.archive-item {
    border: 1px solid rgba(0, 204, 204, 0.3);
    padding: 24px;
    position: relative;
    background: rgba(0, 0, 0, 0.25);
    transition: border-color 0.3s, transform 0.3s, background 0.3s;
}
.archive-item:hover {
    border-color: var(--cyan);
    transform: translateY(-3px);
    background: rgba(0, 204, 204, 0.05);
}
.ai-num {
    font-family: var(--hud-font);
    font-size: 4rem;
    line-height: 1;
    color: rgba(0, 204, 204, 0.3);
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}
.ai-title {
    font-family: var(--hud-font);
    font-size: 1.1rem;
    color: var(--ash);
    letter-spacing: 0.06em;
    margin-bottom: 12px;
}
.ai-body {
    font-size: 0.92rem;
    color: var(--ash);
    line-height: 1.55;
}

/* Closing */
.closing {
    grid-template-columns: 1fr;
    min-height: 80vh;
    align-items: center;
}
.panel-end {
    text-align: center;
    padding: 60px 40px;
}
.end-bignum {
    font-family: var(--hud-font);
    font-size: clamp(8rem, 22vw, 22rem);
    line-height: 0.9;
    letter-spacing: 0.04em;
    color: var(--cyan);
    margin: 20px 0;
    text-shadow: 0 0 24px rgba(0, 204, 204, 0.3);
}
.end-meta {
    font-family: var(--mono-font);
    font-size: 0.85rem;
    color: var(--ash);
    letter-spacing: 0.08em;
    line-height: 2;
    margin-bottom: 24px;
}
.end-flora {
    font-family: var(--mono-font);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    color: var(--moss);
    padding-top: 20px;
    border-top: 1px solid rgba(74, 122, 74, 0.4);
}
.ef-code {
    color: var(--moss);
    font-weight: 700;
    margin-right: 14px;
}
.ef-msg {
    font-style: italic;
    color: var(--moss);
}

/* Responsive */
@media (max-width: 900px) {
    .content { padding: 100px 30px; }
    .hud-top, .hud-bottom { left: 24px; right: 24px; font-size: 0.62rem; }
    .hud-top { grid-template-columns: 1fr; gap: 4px; }
    .hud-bottom { grid-template-columns: 1fr 1fr; }
    .hud-bottom .hud-scroll { display: none; }
    .bracket { width: 40px; height: 40px; }
    .bracket-tl, .bracket-tr { top: 8px; }
    .bracket-bl, .bracket-br { bottom: 8px; }
    .bracket-tl, .bracket-bl { left: 8px; }
    .bracket-tr, .bracket-br { right: 8px; }
    .hero, .data-section, .breakthrough { grid-template-columns: 1fr; }
    .panel-radar, .panel-waveform { transform: none; }
    .vitals-grid { grid-template-columns: repeat(2, 1fr); }
    .archive-grid { grid-template-columns: 1fr; }
    .data-row { grid-template-columns: 50px 1fr 60px; }
    .data-row .dr-bar { grid-column: 1 / 4; }
    .log-item { grid-template-columns: 70px 110px 1fr; }
}