/* ============================================================
   AI User Story Generator — Styles
   ============================================================ */

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

:root {
    --bg-primary: #0F0A1A;
    --bg-secondary: #1A1128;
    --bg-tertiary: #241A34;
    --bg-glass: rgba(255, 255, 255, 0.04);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(108, 99, 255, 0.3);
    --text-primary: #F0ECF7;
    --text-secondary: #A09CB2;
    --text-muted: #6B6580;
    --accent: #6C63FF;
    --accent-hover: #7E76FF;
    --accent-glow: rgba(108, 99, 255, 0.25);
    --purple: #A855F7;
    --green: #34D399;
    --yellow: #FACC15;
    --blue: #3B82F6;
    --pink: #EC4899;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.3);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 15% 10%, rgba(108, 99, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 85% 85%, rgba(168, 85, 247, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.app {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px 48px;
}

/* --- Header --- */
.header {
    padding: 32px 0 24px;
    text-align: center;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    transition: transform var(--transition);
}

.logo:hover .logo-icon {
    transform: rotate(-8deg) scale(1.05);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Main Layout --- */
.main {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 24px;
}

/* --- Panel --- */
.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 24px;
    backdrop-filter: blur(16px);
}

.panel-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group textarea,
.form-group input[type="text"] {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.9rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    resize: vertical;
}

.form-group textarea:focus,
.form-group input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea::placeholder,
.form-group input[type="text"]::placeholder {
    color: var(--text-muted);
}

/* --- Template Buttons --- */
.template-options {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.template-btn {
    padding: 7px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.template-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.template-btn.active {
    border-color: var(--accent);
    background: rgba(108, 99, 255, 0.1);
    color: var(--accent);
}

/* --- Primary Button --- */
.btn-primary {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border: none;
    border-radius: var(--radius-md);
    color: #fff;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--accent-glow);
}

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

/* --- Examples --- */
.examples {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.examples-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.example-chip {
    padding: 5px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.72rem;
    cursor: pointer;
    transition: all var(--transition);
}

.example-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* --- Output Panel --- */
.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.output-actions {
    display: flex;
    gap: 6px;
}

.btn-small {
    padding: 5px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.72rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

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

/* --- Empty State --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 300px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- Stories Container --- */
.stories-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* --- Story Card --- */
.story-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px;
    transition: border-color var(--transition);
    animation: fadeInUp 0.3s ease;
}

.story-card:hover {
    border-color: var(--border-hover);
}

.story-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.story-id {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.story-points {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(108, 99, 255, 0.12);
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent);
}

.story-body {
    font-size: 0.88rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.story-body strong {
    color: var(--accent);
    font-weight: 600;
}

/* --- Acceptance Criteria --- */
.criteria-section {
    margin-top: 12px;
}

.criteria-title {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.criteria-list {
    list-style: none;
    padding: 0;
}

.criteria-list li {
    position: relative;
    padding-left: 20px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    line-height: 1.5;
}

.criteria-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: 700;
    font-size: 0.75rem;
}

/* --- Edge Cases --- */
.edge-cases {
    margin-top: 12px;
    padding: 10px 14px;
    background: rgba(250, 204, 21, 0.06);
    border: 1px solid rgba(250, 204, 21, 0.15);
    border-radius: var(--radius-sm);
}

.edge-cases-title {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--yellow);
    margin-bottom: 6px;
}

.edge-cases-list {
    list-style: none;
    padding: 0;
}

.edge-cases-list li {
    padding-left: 18px;
    position: relative;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.edge-cases-list li::before {
    content: '⚠';
    position: absolute;
    left: 0;
    font-size: 0.7rem;
}

/* --- Epic Badge --- */
.epic-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(168, 85, 247, 0.12);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--purple);
}

/* --- Summary Stats --- */
.summary-stats {
    display: flex;
    gap: 16px;
    margin-top: 20px;
    padding: 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.stat {
    flex: 1;
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* --- History --- */
.history-panel {
    margin-top: 24px;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-clear {
    padding: 4px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-family: var(--font);
    font-size: 0.72rem;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-clear:hover {
    border-color: #F43F5E;
    color: #F43F5E;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.history-item:hover {
    border-color: var(--border-hover);
}

.history-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 70%;
}

.history-meta {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.history-empty {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
    padding: 20px;
}

/* --- Toast --- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 12px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--accent);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 4px 24px var(--accent-glow);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 100;
    pointer-events: none;
}

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

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

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

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

/* --- Responsive --- */
@media (max-width: 768px) {
    .main {
        grid-template-columns: 1fr;
    }

    .header {
        padding: 24px 0 16px;
    }

    .logo h1 {
        font-size: 1.25rem;
    }

    .panel {
        padding: 18px;
    }

    .summary-stats {
        flex-direction: column;
        gap: 12px;
    }

    .output-header {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

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