/* zion – MA Actor workstation
 * Terminal aesthetic: Matrix green on black, Zion HUD screensaver
 * Configurable via .config.colour.* keys
 */

/* ── CSS custom properties (overridden by .config.colour.*) ─────────── */
:root {
    --colour-bg:          #0d0d0d;
    --colour-text:        #00ff41;
    --colour-dimmed:      #008f11;
    --colour-pending:     #008f11;
    --colour-publishing:  #ff8c00;
    --colour-replied:     #00ff41;
    --colour-alias:       #ffd700;
    --colour-error:       #ff3333;
    --colour-system:      #888888;
    --colour-input-bg:    #0a0a0a;
    --colour-border:      #003300;
    --colour-cursor:      #00ff41;
    --colour-highlight:   #003300;
    --font-family:        "Courier New", Courier, "Lucida Console", monospace;
    --font-size:          16px;
    --line-height:        1.5;
}

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

html, body {
    width: 100%;
    height: 100%;
    background: var(--colour-bg);
    color: var(--colour-text);
    font-family: var(--font-family);
    font-size: var(--font-size);
    line-height: var(--line-height);
    overflow: hidden;
}

/* ── App root ────────────────────────────────────────────────────────── */
#app {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* ── Landing page ────────────────────────────────────────────────────── */
.landing {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    height: 100dvh;
    padding: 1rem;
    gap: 2rem;
}

.landing h1 {
    font-size: clamp(2.75rem, 7.5vw, 5.25rem);
    line-height: 0.95;
    letter-spacing: 0.14em;
    text-align: center;
    color: var(--colour-text);
    text-shadow: 0 0 22px var(--colour-text), 0 0 48px rgba(0, 255, 65, 0.22);
    animation: flicker 5s infinite;
    margin-bottom: 0.25rem;
    width: 98%;
    max-width: 900px;
    padding: 2rem;
    margin-top: 25vh;
    flex-shrink: 0;
}

.landing-box {
    border: 1px solid var(--colour-border);
    padding: 1rem;
    min-width: min(400px, calc(100vw - 2rem));
    max-width: 600px;
    width: 100%;
    background: var(--colour-input-bg);
    margin: auto 0;
}

.landing-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--colour-border);
}

.landing-tab {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--colour-dimmed);
    font-family: var(--font-family);
    font-size: var(--font-size);
    padding: 0.4rem 1rem;
    cursor: pointer;
    margin-bottom: -1px;
    letter-spacing: 0.05em;
}

.landing-tab:hover {
    color: var(--colour-text);
}

.landing-tab.active {
    color: var(--colour-text);
    border-bottom-color: var(--colour-text);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.form-row label {
    color: var(--colour-dimmed);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.form-row input {
    background: var(--colour-bg);
    border: 1px solid var(--colour-dimmed);
    color: var(--colour-text);
    font-family: var(--font-family);
    font-size: var(--font-size);
    padding: 0.5rem 0.6rem;
    outline: none;
    width: 100%;
}

.form-row input:focus {
    border-color: var(--colour-text);
    box-shadow: 0 0 6px var(--colour-dimmed);
}

.form-row input::placeholder {
    color: #333;
}

.btn {
    background: none;
    border: 1px solid var(--colour-text);
    color: var(--colour-text);
    font-family: var(--font-family);
    font-size: var(--font-size);
    padding: 0.4rem 1.2rem;
    cursor: pointer;
    letter-spacing: 0.1em;
    transition: background 0.1s, color 0.1s;
}

.btn:hover {
    background: var(--colour-text);
    color: var(--colour-bg);
}

.btn:disabled {
    border-color: var(--colour-dimmed);
    color: var(--colour-dimmed);
    cursor: not-allowed;
}

.btn-row {
    display: flex;
    gap: 0.8rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.btn-sm {
    font-size: 0.8rem;
    padding: 0.2rem 0.6rem;
}

.identity-list {
    list-style: none;
    margin-bottom: 1rem;
}

.identity-list li {
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--colour-border);
    color: var(--colour-dimmed);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.identity-list li:hover {
    color: var(--colour-text);
}

.identity-list li.selected {
    color: var(--colour-text);
}

.identity-list li::before {
    content: "▸";
    color: var(--colour-dimmed);
}

.identity-list li.selected::before {
    content: "▸";
    color: var(--colour-text);
}

.landing-error {
    color: var(--colour-error);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.landing-status {
    color: var(--colour-dimmed);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

@media (max-width: 30em) {
    .landing {
        --font-size: 16px;
    }
    .landing-box {
        padding: 0.75rem;
    }
    .landing-tab {
        padding: 0.4rem 0.6rem;
    }
    .form-row label {
        font-size: 0.9rem;
    }
    .landing-error,
    .landing-status {
        font-size: 0.95rem;
    }
}

/* ── Terminal (main view) ────────────────────────────────────────────── */

/*
 * Three editor placement modes, all using CSS Grid named areas.
 *
 * bottom (default):
 *   [output]  — fills remaining space
 *   [editor]  — collapses to 0 when no .editor-panel is in the DOM
 *   [input ]
 *
 * left / right:
 *   Two-column layout.  The editor column collapses to 0 when absent
 *   (uses :has() — supported in all modern browsers).
 */
.terminal {
    display: grid;
    grid-template-areas:
        "output"
        "editor"
        "input";
    grid-template-rows: 1fr auto auto;
    height: 100vh;
    height: 100dvh;
    width: 100vw;
}

/* ── Left placement ──────────────────────────────────────────────── */
.terminal.placement-left {
    grid-template-areas:
        "editor output"
        "editor input";
    grid-template-columns: 0 1fr;
    grid-template-rows: 1fr auto;
}

.terminal.placement-left:has(.editor-panel) {
    grid-template-columns: 45% 1fr;
}

.terminal.placement-left .editor-panel {
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    border-top: none;
    border-right: 1px solid var(--colour-dimmed);
}

/* ── Right placement ─────────────────────────────────────────────── */
.terminal.placement-right {
    grid-template-areas:
        "output editor"
        "input  editor";
    grid-template-columns: 1fr 0;
    grid-template-rows: 1fr auto;
}

.terminal.placement-right:has(.editor-panel) {
    grid-template-columns: 1fr 45%;
}

.terminal.placement-right .editor-panel {
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    border-top: none;
    border-left: 1px solid var(--colour-dimmed);
}

/* ── Narrow screens: collapse side-by-side placements to stacked ──── */
@media (max-width: 37.5em) {
    .terminal.placement-left,
    .terminal.placement-right,
    .terminal.placement-left:has(.editor-panel),
    .terminal.placement-right:has(.editor-panel) {
        grid-template-areas:
            "output"
            "editor"
            "input";
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto auto;
    }

    .terminal.placement-left .editor-panel,
    .terminal.placement-right .editor-panel {
        height: 50vh;
        border-right: none;
        border-left: none;
        border-top: 1px solid var(--colour-dimmed);
    }

    .input-row {
        padding: 0.4rem 0.5rem;
    }
}

.terminal-output {
    grid-area: output;
    overflow-y: auto;
    padding: 0.5rem 1rem;
    scroll-behavior: smooth;
}

.terminal-output::-webkit-scrollbar {
    width: 6px;
}

.terminal-output::-webkit-scrollbar-track {
    background: var(--colour-bg);
}

.terminal-output::-webkit-scrollbar-thumb {
    background: var(--colour-border);
}

.terminal-line {
    white-space: pre-wrap;
    word-break: break-all;
    font-family: var(--font-family);
    font-size: var(--font-size);
    line-height: var(--line-height);
    padding: 0 0 0.05rem 0;
}

.line-output { color: var(--colour-text); }
.line-input  { color: var(--colour-dimmed); }
.line-pending    { color: var(--colour-pending); }
.line-pending::after {
    content: " …";
    animation: pending-pulse 1.2s ease-in-out infinite;
}
@keyframes pending-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}
.line-publishing { color: var(--colour-publishing); }
.line-dimmed     { color: var(--colour-dimmed); }
.line-replied    { color: var(--colour-replied); }
.line-reply   { color: var(--colour-replied); }
.line-error  { color: var(--colour-error); }
.line-system { color: var(--colour-system); }

.line-alias  { color: var(--colour-alias); }

/* ── Input row ───────────────────────────────────────────────────────── */
.input-row {
    grid-area: input;
    display: flex;
    align-items: center;
    padding: 0.4rem 1rem;
    border-top: 1px solid var(--colour-border);
    background: var(--colour-input-bg);
    gap: 0.4rem;
}

.input-prompt {
    color: var(--colour-dimmed);
    white-space: nowrap;
    user-select: none;
    font-family: var(--font-family);
}

.input-prompt.focus-mode {
    color: var(--colour-alias);
}

@keyframes terminal-blink {
    0%   { caret-color: var(--colour-cursor); }
    50%  { caret-color: transparent; }
    100% { caret-color: var(--colour-cursor); }
}

.input-field {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--colour-text);
    font-family: var(--font-family);
    font-size: var(--font-size);
    caret-color: transparent;
    caret-shape: block;
}

.input-field:focus {
    caret-animation: none;
    animation: terminal-blink 1s step-end infinite;
}

.input-field::selection {
    background: var(--colour-highlight);
}

/* ── Screensaver ─────────────────────────────────────────────────────── */
.screensaver {
    position: fixed;
    inset: 0;
    background: #020408;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow: hidden;
}

.screensaver canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.screensaver-overlay {
    position: relative;
    z-index: 2;
    text-align: center;
    pointer-events: none;
}

/* "DON'T PANIC" background watermark — very faint, slow pulse */
.dont-panic-title {
    font-size: clamp(1.4rem, 5vw, 3.2rem);
    font-weight: bold;
    letter-spacing: 0.35em;
    color: #00ff9f;
    opacity: 0.09;
    text-shadow:
        0 0 20px #00ff9f,
        0 0 45px #00d4ff;
    animation: hud-pulse 5s ease-in-out infinite;
    user-select: none;
    pointer-events: none;
}

/* ── Animations ──────────────────────────────────────────────────────── */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

@keyframes flicker {
    0%, 95%, 100% { opacity: 1; }
    96%           { opacity: 0.8; }
    97%           { opacity: 1; }
    98%           { opacity: 0.6; }
    99%           { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { text-shadow: 0 0 20px #fff, 0 0 40px #00ff41, 0 0 80px #00ff41; }
    50%       { text-shadow: 0 0 30px #fff, 0 0 60px #00ff41, 0 0 120px #00ff41; }
}

@keyframes hud-pulse {
    0%, 100% { opacity: 0.08; }
    50%       { opacity: 0.18; }
}

/* ── Utility ─────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

.dimmed { color: var(--colour-dimmed); }
.green  { color: var(--colour-text); }
.gold   { color: var(--colour-alias); }
.red    { color: var(--colour-error); }
.grey   { color: var(--colour-system); }

/* ── Editor panel (placement-aware) ─────────────────────────────────── */

/*
 * bottom: sits between output and input (grid-area: editor, row 2).
 * left / right: fills the side column (full viewport height).
 *
 * The panel is only present in the DOM when an editor is open; the grid
 * row / column collapses automatically via :has() when it is absent.
 */

.editor-panel {
    grid-area: editor;
    display: flex;
    flex-direction: column;
    height: 40vh;
    min-height: 200px;
    border-top: 1px solid var(--colour-dimmed);
    background: var(--colour-input-bg);
    flex-shrink: 0;
    overflow: hidden;
}

.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.6rem;
    border-bottom: 1px solid var(--colour-dimmed);
    background: var(--colour-input-bg);
    flex-shrink: 0;
}

.editor-doc-path {
    flex: 1;
    color: var(--colour-alias);
    font-size: 0.85em;
    font-family: var(--font-family);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.editor-lang-select {
    background: var(--colour-bg);
    color: var(--colour-text);
    border: 1px solid var(--colour-dimmed);
    padding: 0.15rem 0.3rem;
    font-family: var(--font-family);
    font-size: 0.8em;
}

.editor-btn {
    background: transparent;
    border: 1px solid var(--colour-dimmed);
    color: var(--colour-text);
    padding: 0.2rem 0.6rem;
    cursor: pointer;
    font-size: 0.8em;
    font-family: inherit;
}

.editor-btn:hover { border-color: var(--colour-text); }
.btn-eval  { color: var(--colour-alias); border-color: var(--colour-alias); }
.btn-eval:hover  { background: rgba(255, 222, 173, 0.1); }
.btn-cancel { color: var(--colour-error); }
.btn-cancel:hover { background: rgba(255, 80, 80, 0.1); }

.editor-cm-host {
    flex: 1;
    overflow: auto;
    font-size: 0.9em;
    background: var(--colour-bg);
}

/* CodeMirror dark theme overrides */
.editor-cm-host .cm-editor {
    height: 100%;
    background: var(--colour-bg);
    color: var(--colour-text);
}
.editor-cm-host .cm-gutters {
    background: var(--colour-bg);
    border-right: 1px solid var(--colour-dimmed);
    color: var(--colour-dimmed);
}
.editor-cm-host .cm-activeLineGutter,
.editor-cm-host .cm-activeLine { background: rgba(255,255,255,0.04); }
.editor-cm-host .cm-cursor,
.editor-cm-host .cm-dropCursor {
    border-left: none !important;
    background-color: var(--colour-cursor);
    width: 1ch !important;
    opacity: 0.7;
    animation: editor-blink 1s step-end infinite;
}
@keyframes editor-blink {
    0%   { opacity: 0.7; }
    50%  { opacity: 0; }
    100% { opacity: 0.7; }
}