/* FF Clocks - Hands of Time Solver Theme */
:root {
    --bg-main: #0b0f19;
    --bg-card: #131b2e;
    --bg-card-hover: #1c2742;
    --bg-control: #1a233a;
    --border-color: #263554;
    --border-highlight: #3b82f6;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-cyan: #00f0ff;
    --color-cyan-glow: rgba(0, 240, 255, 0.4);
    --color-gold: #ffbe0b;
    --color-gold-glow: rgba(255, 190, 11, 0.4);
    --color-accent: #38bdf8;
    --color-purple: #c084fc;
    --color-success: #10b981;
    --color-danger: #f43f5e;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.ff-app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem 1rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-icon {
    font-size: 1.75rem;
    filter: drop-shadow(0 0 8px var(--color-cyan-glow));
}

.brand-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 30%, var(--color-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--color-cyan);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

/* Main Grid Layout */
.main-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    flex: 1;
}

@media (min-width: 860px) {
    .main-layout {
        grid-template-columns: 460px 1fr;
        align-items: start;
    }
}

/* Glassmorphism Card Containers */
.card-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Clock Container */
.clock-display-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.clock-svg {
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 1 / 1;
    touch-action: manipulation;
}

/* SVG Elements */
.clock-node {
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.clock-node:hover {
    filter: brightness(1.2);
}

.clock-node circle.outer {
    stroke-width: 2.5;
    transition: all 0.2s ease;
}

.clock-node.selected circle.outer {
    stroke: var(--color-cyan);
    stroke-width: 4;
    filter: drop-shadow(0 0 10px var(--color-cyan));
    animation: pulse-ring 1.8s infinite;
}

.clock-node.active-step circle.outer {
    stroke: var(--color-gold);
    stroke-width: 4.5;
    filter: drop-shadow(0 0 12px var(--color-gold));
}

.clock-node.visited-past circle.inner {
    opacity: 0.35;
}

@keyframes pulse-ring {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Node Text */
.node-value-text {
    font-size: 19px;
    font-weight: 800;
    text-anchor: middle;
    dominant-baseline: central;
    fill: #ffffff;
    pointer-events: none;
}

.node-badge-text {
    font-size: 10px;
    font-weight: 700;
    text-anchor: middle;
    dominant-baseline: central;
    fill: #0b0f19;
    pointer-events: none;
}

/* Controls Column */
.controls-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Size Pills */
.section-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.size-pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.pill-btn {
    flex: 1 0 38px;
    min-height: 40px;
    background: var(--bg-control);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pill-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
}

.pill-btn.active {
    background: linear-gradient(135deg, #1e40af, #2563eb);
    border-color: #60a5fa;
    color: #ffffff;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.5);
}

/* Keypad for lightning fast entry */
.keypad-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.keypad-btn {
    min-height: 52px;
    background: var(--bg-control);
    border: 1px solid var(--border-color);
    color: #ffffff;
    font-size: 1.35rem;
    font-weight: 800;
    border-radius: 0.65rem;
    cursor: pointer;
    transition: all 0.12s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.keypad-btn:active {
    transform: scale(0.94);
    filter: brightness(1.2);
}

.keypad-btn.action-btn {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.keypad-btn.solve-btn {
    background: linear-gradient(135deg, #059669, #10b981);
    color: #ffffff;
    border-color: #34d399;
    font-size: 1.05rem;
    font-weight: 800;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

.keypad-btn.solve-btn:hover {
    filter: brightness(1.15);
}

/* Solution Display Card */
.solution-card {
    background: linear-gradient(145deg, #16203a, #1a2542);
    border: 1px solid #2d416b;
    border-radius: 0.85rem;
    padding: 1rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.solution-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.solution-badge {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: var(--color-success);
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.step-banner {
    background: rgba(11, 15, 25, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.85rem;
    text-align: center;
    margin-bottom: 0.85rem;
}

.step-banner-num {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.step-banner-desc {
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
}

/* Walkthrough Navigation Controls */
.walkthrough-ctrls {
    display: flex;
    gap: 0.4rem;
    justify-content: center;
}

.ctrl-btn {
    flex: 1;
    min-height: 42px;
    background: var(--bg-control);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

.ctrl-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
}

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

.ctrl-btn.play-btn {
    background: linear-gradient(135deg, #7c3aed, #9333ea);
    border-color: #c084fc;
    color: #ffffff;
    box-shadow: 0 0 10px rgba(147, 51, 234, 0.4);
}

/* Step Sequence Chips */
.step-sequence-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.75rem;
    max-height: 180px;
    overflow-y: auto;
    padding: 0.25rem;
}

.step-chip {
    padding: 0.35rem 0.65rem;
    background: var(--bg-control);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.step-chip:hover {
    border-color: var(--color-cyan);
}

.step-chip.active {
    background: rgba(255, 190, 11, 0.2);
    border-color: var(--color-gold);
    color: var(--color-gold);
    font-weight: 700;
    box-shadow: 0 0 8px var(--color-gold-glow);
}

.step-chip.visited {
    opacity: 0.6;
}

/* Quick Paste Form */
.quick-input-box {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.quick-text-input {
    flex: 1;
    background: var(--bg-control);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    font-family: monospace;
}

.quick-text-input:focus {
    outline: none;
    border-color: var(--color-cyan);
    box-shadow: 0 0 8px var(--color-cyan-glow);
}

/* Small helper / buttons */
.btn-sm-subtle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 0.4rem;
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    cursor: pointer;
}

.btn-sm-subtle:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* Alert styles */
.alert-box {
    padding: 0.75rem 1rem;
    border-radius: 0.65rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-danger {
    background: rgba(244, 63, 94, 0.15);
    border: 1px solid rgba(244, 63, 94, 0.4);
    color: #fda4af;
}

.alert-info {
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid rgba(56, 189, 248, 0.4);
    color: #bae6fd;
}

/* Utility */
.badge-count {
    background: var(--bg-control);
    padding: 0.15rem 0.4rem;
    border-radius: 0.35rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Loading Spinner */
.loading-progress {
    position: absolute;
    display: block;
    width: 6rem;
    height: 6rem;
    inset: 35vh 0 auto 0;
    margin: 0 auto;
}

.loading-progress circle {
    fill: none;
    stroke: #1e293b;
    stroke-width: 0.5rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: var(--color-cyan);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    color: var(--color-cyan);
    inset: calc(35vh + 2.25rem) 0 auto 0;
}

#blazor-error-ui {
    background: #1e1b4b;
    color: #fca5a5;
    bottom: 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.6);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 2000;
}

#blazor-error-ui .reload {
    color: var(--color-cyan);
    margin-left: 0.5rem;
    text-decoration: underline;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
    color: var(--text-secondary);
}