/* ==================================================================
   AI Variable Namer — Styles
   Theme: Dark Mode with Neon Mint palette
   Primary: #22D3EE | Secondary: #67E8F9 | Accent: #F472B6 | BG: #0B1120
   ================================================================== */

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

:root {
    --primary: #22D3EE;
    --primary-rgb: 34, 211, 238;
    --secondary: #67E8F9;
    --secondary-rgb: 103, 232, 249;
    --accent: #F472B6;
    --accent-rgb: 244, 114, 182;
    --bg: #0B1120;
    --bg-card: rgba(15, 23, 42, 0.7);
    --bg-elevated: rgba(30, 41, 59, 0.5);
    --text: #E2E8F0;
    --text-muted: #94A3B8;
    --text-dim: #64748B;
    --border: rgba(34, 211, 238, 0.15);
    --border-hover: rgba(34, 211, 238, 0.35);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 30px rgba(var(--primary-rgb), 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ── Ambient Glow Background ──────────────────────────────────── */
.ambient-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -100px;
    animation: floatGlow 15s ease-in-out infinite;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: var(--accent);
    bottom: -150px;
    left: -100px;
    animation: floatGlow 18s ease-in-out infinite reverse;
}

@keyframes floatGlow {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -20px) scale(1.05);
    }

    66% {
        transform: translate(-20px, 15px) scale(0.95);
    }
}

/* ── Glass Card ────────────────────────────────────────────────── */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

/* ── Header ────────────────────────────────────────────────────── */
.app-header {
    text-align: center;
    padding: 2.5rem 1rem 1.5rem;
    position: relative;
    z-index: 1;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.15);
    }
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.tagline {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.02em;
}

/* ── Main Layout ───────────────────────────────────────────────── */
.app-main {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 1rem 3rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: relative;
    z-index: 1;
}

/* ── Input Section ─────────────────────────────────────────────── */
.input-section {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.input-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.01em;
}

.description-textarea {
    width: 100%;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font);
    font-size: 1rem;
    padding: 0.875rem 1rem;
    resize: vertical;
    transition: border-color var(--transition), box-shadow var(--transition);
    line-height: 1.5;
}

.description-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.description-textarea::placeholder {
    color: var(--text-dim);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.25rem;
}

/* ── Options Row ───────────────────────────────────────────────── */
.options-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.option-group {
    flex: 1;
    min-width: 140px;
}

.option-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.375rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.option-select {
    width: 100%;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.875rem;
    padding: 0.625rem 0.75rem;
    cursor: pointer;
    transition: border-color var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.option-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* ── Toggle Switch ─────────────────────────────────────────────── */
.toggle-group {
    display: flex;
    align-items: flex-end;
    padding-bottom: 0.35rem;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-muted);
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch {
    width: 42px;
    height: 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    position: relative;
    transition: background var(--transition), border-color var(--transition);
    flex-shrink: 0;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: var(--text-muted);
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform var(--transition), background var(--transition);
}

.toggle-label input:checked+.toggle-switch {
    background: rgba(var(--primary-rgb), 0.2);
    border-color: var(--primary);
}

.toggle-label input:checked+.toggle-switch::after {
    transform: translateX(18px);
    background: var(--primary);
}

/* ── Batch Section ─────────────────────────────────────────────── */
.batch-section {
    animation: slideDown 0.3s ease-out;
}

.batch-textarea {
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Generate Button ───────────────────────────────────────────── */
.generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 600;
    color: var(--bg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
    position: relative;
    overflow: hidden;
}

.generate-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.2) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.generate-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 30px rgba(var(--primary-rgb), 0.35);
}

.generate-btn:hover::before {
    transform: translateX(100%);
}

.generate-btn:active {
    transform: translateY(0);
}

/* ── Results Section ───────────────────────────────────────────── */
.results-section {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.result-card {
    animation: fadeInUp 0.4s ease-out both;
}

.result-card:nth-child(2) {
    animation-delay: 0.05s;
}

.result-card:nth-child(3) {
    animation-delay: 0.1s;
}

.result-card:nth-child(4) {
    animation-delay: 0.15s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-card-inner {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.result-card-inner:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.result-description {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-description .desc-text {
    font-style: italic;
}

.type-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: rgba(var(--accent-rgb), 0.15);
    color: var(--accent);
    border-radius: 20px;
    border: 1px solid rgba(var(--accent-rgb), 0.25);
}

.naming-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.name-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    cursor: pointer;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.name-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.15);
}

.name-item:active {
    transform: translateY(0);
}

.name-convention {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 0.375rem;
    font-weight: 600;
}

.name-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--primary);
    word-break: break-all;
}

.name-copy-hint {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.65rem;
    color: var(--text-dim);
    opacity: 0;
    transition: opacity var(--transition);
}

.name-item:hover .name-copy-hint {
    opacity: 1;
}

/* ── Abbreviations ─────────────────────────────────────────────── */
.abbreviations-row {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.abbreviations-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    font-weight: 600;
    margin-bottom: 0.375rem;
}

.abbreviation-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.abbrev-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    background: rgba(var(--secondary-rgb), 0.1);
    border: 1px solid rgba(var(--secondary-rgb), 0.2);
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--secondary);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
}

.abbrev-chip:hover {
    background: rgba(var(--secondary-rgb), 0.2);
    border-color: var(--secondary);
}

/* ── Warnings ──────────────────────────────────────────────────── */
.warnings-row {
    margin-top: 0.75rem;
}

.warning-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    background: rgba(251, 191, 36, 0.08);
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: var(--radius-xs);
    font-size: 0.8rem;
    color: #FBBF24;
    margin-bottom: 0.5rem;
}

.warning-item .warning-icon {
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* ── Copied Toast ──────────────────────────────────────────────── */
.copy-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--primary);
    color: var(--bg);
    padding: 0.625rem 1.25rem;
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.4);
}

.copy-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ── History Section ───────────────────────────────────────────── */
.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.clear-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition);
}

.clear-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.history-list::-webkit-scrollbar {
    width: 4px;
}

.history-list::-webkit-scrollbar-track {
    background: transparent;
}

.history-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.empty-state {
    text-align: center;
    color: var(--text-dim);
    padding: 2rem;
    font-size: 0.875rem;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-xs);
    border: 1px solid transparent;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    animation: fadeInUp 0.25s ease-out both;
}

.history-item:hover {
    border-color: var(--border);
    background: rgba(30, 41, 59, 0.7);
}

.history-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-name {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--primary);
    flex-shrink: 0;
}

.history-lang {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    background: rgba(var(--primary-rgb), 0.1);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    flex-shrink: 0;
}

/* ── Footer ────────────────────────────────────────────────────── */
.app-footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-dim);
    font-size: 0.75rem;
    position: relative;
    z-index: 1;
}

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

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .logo h1 {
        font-size: 1.5rem;
    }

    .app-main {
        padding: 0 0.75rem 2rem;
    }

    .glass-card {
        padding: 1.25rem;
    }

    .options-row {
        flex-direction: column;
    }

    .option-group {
        min-width: 100%;
    }

    .naming-grid {
        grid-template-columns: 1fr;
    }

    .history-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

@media (max-width: 400px) {
    .logo h1 {
        font-size: 1.25rem;
    }

    .tagline {
        font-size: 0.875rem;
    }
}