/* TRSTD Demo — iOS 7 dark mode, content over chrome */

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

:root {
    --text-primary: rgba(255, 255, 255, 0.92);
    --text-secondary: rgba(255, 255, 255, 0.72);
    --text-tertiary: rgba(255, 255, 255, 0.55);
    --bg-base: #09090b;
    --bg-elevated: #111113;
    --bg-surface: #18181b;
    --bg-hover: rgba(255, 255, 255, 0.04);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.10);

    /* Semantic — only saturated colors carry meaning */
    --pass: #22c55e;
    --fail: #ef4444;
    --warn: #f59e0b;
    --info: #3b82f6;
    --pass-bg: rgba(34, 197, 94, 0.08);
    --fail-bg: rgba(239, 68, 68, 0.08);
    --warn-bg: rgba(245, 158, 11, 0.08);
    --info-bg: rgba(59, 130, 246, 0.08);

    /* Protocol stack colors */
    --wba-color: #6366f1;
    --tsai-color: #8b5cf6;
    --trstd-color: #06b6d4;
}

body {
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    background: var(--bg-base);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Top bar — minimal, defers to content */
.top-bar {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo-mark {
    color: var(--trstd-color);
    font-size: 16px;
}

.logo-text {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.08em;
}

.logo-sub {
    font-size: 11px;
    color: var(--text-tertiary);
    font-weight: 400;
}

.view-tabs {
    display: flex;
    gap: 2px;
    background: var(--bg-elevated);
    border-radius: 6px;
    padding: 2px;
}

.view-tab {
    font-family: inherit;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 4px;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: all 0.15s ease;
}

.view-tab:hover { color: var(--text-secondary); }
.view-tab.active { background: var(--bg-surface); color: var(--text-primary); }

.scenario-selector {
    display: flex;
    gap: 2px;
    background: var(--bg-elevated);
    border-radius: 6px;
    padding: 2px;
    margin-left: auto;
}

.scenario-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-family: inherit;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.scenario-btn:hover {
    color: var(--text-secondary);
}

.scenario-btn.active {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.run-btn {
    background: var(--trstd-color);
    color: #000;
    border: none;
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    padding: 7px 18px;
    border-radius: 6px;
    cursor: pointer;
    letter-spacing: 0.02em;
    transition: opacity 0.15s ease;
}

.run-btn:hover {
    opacity: 0.85;
}

.run-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.step-counter {
    font-size: 11px;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
    min-width: 48px;
}

.mode-toggle {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-tertiary);
    font-family: inherit;
    font-size: 10px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    letter-spacing: 0.04em;
    transition: all 0.15s ease;
}

.mode-toggle:hover { color: var(--text-secondary); }
.mode-toggle.live { color: var(--pass); border-color: rgba(34, 197, 94, 0.3); }

/* Three-lane layout */
.lanes {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1px;
    background: var(--border-subtle);
    flex: 1;
    overflow: hidden;
}

.lane {
    background: var(--bg-base);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.lane-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.lane-icon {
    font-size: 20px;
    margin-bottom: 8px;
}

.lane-title {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.lane-subtitle {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.lane-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Step cards */
.step {
    padding: 12px 14px;
    border-radius: 6px;
    border-left: 2px solid transparent;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.step.visible {
    opacity: 1;
    transform: translateY(0);
}

.step.pass {
    border-left-color: var(--pass);
    background: var(--pass-bg);
}

.step.fail {
    border-left-color: var(--fail);
    background: var(--fail-bg);
}

.step.warn {
    border-left-color: var(--warn);
    background: var(--warn-bg);
}

.step.info {
    border-left-color: var(--info);
    background: var(--info-bg);
}

.step.pending {
    border-left-color: var(--text-tertiary);
    background: var(--bg-hover);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.step-icon {
    font-size: 12px;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.step-title {
    font-size: 12px;
    font-weight: 500;
}

.step-detail {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.5;
    padding-left: 24px;
}

.step-detail code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 10px;
    background: rgba(255, 255, 255, 0.06);
    padding: 1px 5px;
    border-radius: 3px;
    color: var(--text-primary);
}

/* Connector lines between steps */
.connector {
    width: 1px;
    height: 12px;
    background: var(--border-medium);
    margin-left: 21px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.connector.visible {
    opacity: 1;
}

/* Protocol stack footer */
.protocol-stack {
    display: flex;
    border-top: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.stack-layer {
    flex: 1;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 2px solid transparent;
}

.stack-layer.stack-wba { border-left-color: var(--wba-color); }
.stack-layer.stack-tsai { border-left-color: var(--tsai-color); }
.stack-layer.stack-trstd { border-left-color: var(--trstd-color); }

.stack-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.stack-desc {
    font-size: 10px;
    color: var(--text-tertiary);
}

/* Active layer highlight during verification */
.stack-layer.active {
    background: var(--bg-elevated);
}

/* Verdict banner */
.verdict {
    padding: 14px;
    border-radius: 6px;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: -0.01em;
    opacity: 0;
    transform: scale(0.97);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.verdict.visible {
    opacity: 1;
    transform: scale(1);
}

.verdict.verified {
    background: var(--pass-bg);
    color: var(--pass);
    border: 1px solid rgba(34, 197, 94, 0.15);
}

.verdict.rejected {
    background: var(--fail-bg);
    color: var(--fail);
    border: 1px solid rgba(239, 68, 68, 0.15);
}

/* Scrollbar — minimal */
.lane-body::-webkit-scrollbar {
    width: 4px;
}

.lane-body::-webkit-scrollbar-track {
    background: transparent;
}

.lane-body::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 2px;
}

/* Pulse animation for pending steps */
@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.step.pending .step-icon {
    animation: pulse 1.2s ease-in-out infinite;
}