/* ============================================
   AI Market Research Generator — Stylesheet
   Premium design with light/dark mode support
   ============================================ */

/* ---- CSS Variables (Design Tokens) ---- */
:root {
    /* Colors — Light Mode */
    --color-bg: #fafbfc;
    --color-surface: #ffffff;
    --color-surface-raised: #ffffff;
    --color-surface-hover: #f8f9fb;
    --color-border: #e5e7eb;
    --color-border-subtle: #f0f1f3;
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #ffffff;

    /* Accent */
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-light: #eef2ff;
    --color-accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);

    /* Agent colors */
    --agent-1: #6366f1;
    --agent-2: #06b6d4;
    --agent-3: #10b981;
    --agent-4: #f59e0b;
    --agent-5: #ef4444;

    /* Status */
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 40px -12px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);

    /* Sizing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --max-width: 900px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Dark Mode ---- */
[data-theme="dark"] {
    --color-bg: #0b0f1a;
    --color-surface: #111827;
    --color-surface-raised: #1e293b;
    --color-surface-hover: #1e293b;
    --color-border: #1e293b;
    --color-border-subtle: #1e293b;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-text-inverse: #0f172a;

    --color-accent-light: rgba(99, 102, 241, 0.12);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px -12px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    transition: background var(--transition-base), color var(--transition-base);
}

/* ---- Background Effects ---- */
.bg-gradient {
    position: fixed;
    top: -40%;
    left: -20%;
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse at center,
        rgba(99, 102, 241, 0.06) 0%,
        rgba(139, 92, 246, 0.03) 40%,
        transparent 70%);
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] .bg-gradient {
    background: radial-gradient(ellipse at center,
        rgba(99, 102, 241, 0.08) 0%,
        rgba(139, 92, 246, 0.04) 40%,
        transparent 70%);
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] .bg-grid {
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--color-accent);
    color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ---- App Container ---- */
.app-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ---- Header ---- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: 48px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.nav-btn.active {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

/* ---- Hero Section ---- */
.hero {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 24px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    color: var(--color-text-primary);
}

.gradient-text {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ---- Input Card ---- */
.input-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-bottom: 64px;
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.input-card:focus-within {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.card-inner {
    padding: 28px;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 12px;
}

.idea-input {
    width: 100%;
    padding: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    min-height: 120px;
}

.idea-input::placeholder {
    color: var(--color-text-tertiary);
}

.idea-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
}

.char-count {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

/* ---- Buttons ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--color-accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover::after {
    opacity: 1;
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-light);
}

/* ---- Agent Showcase ---- */
.agents-showcase {
    margin-bottom: 64px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.agents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 32px;
}

.agent-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    position: relative;
    transition: all var(--transition-base);
    animation: fadeInUp 0.5s ease-out calc(var(--delay) * 0.1s) both;
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.agent-number {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-text-tertiary);
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.agent-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    color: white;
}

.agent-icon-1 { background: linear-gradient(135deg, #6366f1, #818cf8); }
.agent-icon-2 { background: linear-gradient(135deg, #06b6d4, #22d3ee); }
.agent-icon-3 { background: linear-gradient(135deg, #10b981, #34d399); }
.agent-icon-4 { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.agent-icon-5 { background: linear-gradient(135deg, #ef4444, #f87171); }

.agent-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text-primary);
    line-height: 1.3;
}

.agent-card p {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ---- Loading Section ---- */
.loading-container {
    text-align: center;
    padding: 40px 0;
    animation: fadeIn 0.4s ease-out;
}

.loading-visual {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 32px;
}

.loading-ring {
    position: absolute;
    inset: 0;
}

.ring-segment {
    position: absolute;
    inset: 0;
    border: 3px solid transparent;
    border-radius: 50%;
}

.ring-1 {
    border-top-color: var(--agent-1);
    animation: spin 1.5s linear infinite;
}

.ring-2 {
    inset: 10px;
    border-right-color: var(--agent-2);
    animation: spin 2s linear infinite reverse;
}

.ring-3 {
    inset: 20px;
    border-bottom-color: var(--agent-3);
    animation: spin 2.5s linear infinite;
}

.loading-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    animation: pulse 2s ease-in-out infinite;
}

.loading-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.loading-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.product-idea-preview {
    display: inline-block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto 32px;
    line-height: 1.5;
    text-align: left;
    word-break: break-word;
}

/* ---- Agent Progress Steps ---- */
.agent-progress {
    max-width: 420px;
    margin: 0 auto 32px;
    text-align: left;
}

.progress-step {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border-subtle);
    opacity: 0.4;
    transition: all var(--transition-base);
}

.progress-step:last-child {
    border-bottom: none;
}

.progress-step.active {
    opacity: 1;
}

.progress-step.completed {
    opacity: 0.7;
}

.step-indicator {
    flex-shrink: 0;
}

.step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
    transition: all var(--transition-base);
}

.progress-step.active .step-dot {
    background: var(--color-accent);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
    animation: pulse 1.5s infinite;
}

.progress-step.completed .step-dot {
    background: var(--color-success);
}

.step-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex: 1;
    gap: 8px;
}

.step-name {
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.step-status {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

.progress-step.active .step-status {
    color: var(--color-accent);
    font-weight: 500;
}

.progress-step.completed .step-status {
    color: var(--color-success);
}

.loading-note {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    font-style: italic;
}

/* ---- Result Section ---- */
.result-header {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
    animation: fadeInUp 0.5s ease-out;
}

.result-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.result-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
}

.result-date {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.result-title {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.result-idea {
    display: inline-block;
    background: var(--color-accent-light);
    color: var(--color-accent);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    max-width: 600px;
    margin-bottom: 24px;
}

.result-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* ---- Report Content ---- */
.report-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin-bottom: 48px;
    animation: fadeInUp 0.5s ease-out 0.15s both;
    line-height: 1.8;
}

.report-content h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-top: 32px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-accent);
    color: var(--color-text-primary);
}

.report-content h1:first-child {
    margin-top: 0;
}

.report-content h2 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-top: 28px;
    margin-bottom: 12px;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
}

.report-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 20px;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.report-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 16px;
    margin-bottom: 6px;
    color: var(--color-text-secondary);
}

.report-content p {
    margin-bottom: 12px;
    color: var(--color-text-secondary);
}

.report-content ul, .report-content ol {
    padding-left: 24px;
    margin-bottom: 12px;
}

.report-content li {
    margin-bottom: 6px;
    color: var(--color-text-secondary);
}

.report-content strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.report-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.85rem;
    overflow-x: auto;
    display: block;
}

.report-content thead {
    background: var(--color-accent-light);
}

.report-content th {
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    color: var(--color-accent);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

.report-content td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-border-subtle);
    color: var(--color-text-secondary);
    vertical-align: top;
}

.report-content tr:hover td {
    background: var(--color-surface-hover);
}

.report-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding: 12px 20px;
    margin: 16px 0;
    background: var(--color-accent-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.report-content code {
    background: var(--color-accent-light);
    color: var(--color-accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

.report-content pre {
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    overflow-x: auto;
    margin: 16px 0;
}

.report-content pre code {
    background: none;
    padding: 0;
    color: var(--color-text-primary);
}

.report-content hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: 32px 0;
}

.report-content a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.report-content a:hover {
    text-decoration: underline;
}

/* ---- History Section ---- */
ection .history-header {
    text-align: center;
    margin-bottom: 32px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 64px;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.history-item:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.history-item-info {
    flex: 1;
    min-width: 0;
}

.history-item-idea {
    font-size: 0.925rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.history-item-date {
    font-size: 0.775rem;
    color: var(--color-text-tertiary);
}

.history-item-arrow {
    color: var(--color-text-tertiary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-left: 16px;
}

.history-item:hover .history-item-arrow {
    color: var(--color-accent);
    transform: translateX(4px);
}

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-tertiary);
}

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state p {
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* ---- Error Section ---- */
.error-container {
    text-align: center;
    padding: 60px 24px;
    animation: fadeInUp 0.4s ease-out;
}

.error-icon {
    color: var(--color-error);
    margin-bottom: 20px;
}

.error-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.error-message {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ---- Footer ---- */
.app-footer {
    text-align: center;
    padding: 32px 0;
    border-top: 1px solid var(--color-border-subtle);
    margin-top: 32px;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.heart {
    color: var(--color-error);
    display: inline-block;
    animation: heartbeat 1.5s ease-in-out infinite;
}

/* ---- Toast ---- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--color-text-primary);
    color: var(--color-bg);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-base);
    z-index: 200;
    pointer-events: none;
}

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

/* ---- Sections ---- */
.section { display: block; }
.hidden { display: none !important; }

/* ---- Animations ---- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.2); }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .app-container {
        padding: 0 16px;
    }

    .app-header {
        margin-bottom: 32px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

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

    .card-inner {
        padding: 20px;
    }

    .input-footer {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }

    .btn-primary {
        justify-content: center;
    }

    .report-content {
        padding: 24px 20px;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions button {
        width: 100%;
        justify-content: center;
    }

    .theme-toggle {
        top: 12px;
        right: 12px;
    }

    .step-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }
}

@media (max-width: 480px) {
    .agents-grid {
        grid-template-columns: 1fr;
    }

    .nav-btn span {
        display: none;
    }

    .logo-text {
        font-size: 1.1rem;
    }
}