/* ═══════════════════════════════════════════
   1MinuteReel — Design System & Base Styles
   Matches 1MinuteFunnel design patterns
   ═══════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
    /* Brand Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-primary-bg: #eef2ff;

    /* Semantic Colors */
    --color-success: #22c55e;
    --color-success-bg: #f0fdf4;
    --color-error: #ef4444;
    --color-error-bg: #fef2f2;
    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-info: #3b82f6;
    --color-info-bg: #eff6ff;

    /* Neutrals */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-hover: #f1f5f9;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-light: #94a3b8;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* Borders */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --header-height: 60px;
    --sidebar-width: 280px;
    --max-content-width: 1200px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

img { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; }

/* ── Typography ── */
h1 { font-size: var(--font-size-3xl); font-weight: 700; line-height: 1.2; }
h2 { font-size: var(--font-size-2xl); font-weight: 600; line-height: 1.3; }
h3 { font-size: var(--font-size-xl); font-weight: 600; line-height: 1.4; }
h4 { font-size: var(--font-size-lg); font-weight: 600; line-height: 1.4; }

.text-secondary { color: var(--color-text-secondary); }
.text-light { color: var(--color-text-light); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
    white-space: nowrap;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
    background: var(--color-surface-hover);
}

.btn-danger {
    background: var(--color-error);
    color: #fff;
    border-color: var(--color-error);
}
.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-success {
    background: var(--color-success);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-hover);
    box-shadow: none;
    transform: none;
}

.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-size-lg);
}

.btn-icon {
    padding: 8px;
    min-width: 36px;
    min-height: 36px;
}

/* ── Cards ── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}
.card-hover:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
    cursor: pointer;
}

/* ── Forms ── */
.form-group {
    margin-bottom: var(--space-4);
}
.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}
.form-input::placeholder {
    color: var(--color-text-light);
}
.form-textarea {
    resize: vertical;
    min-height: 80px;
}

/* ── Modals ── */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9000;
}
.modal.active {
    display: block;
}
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}
.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideUp 0.2s ease;
}
@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border);
}
.modal-header h3 {
    margin: 0;
}
.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-text-light);
    padding: 4px;
    line-height: 1;
}
.modal-close:hover {
    color: var(--color-text);
}
.modal-body {
    padding: var(--space-6);
}
.modal-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ── Badges ── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    line-height: 1.4;
}
.badge-primary { background: var(--color-primary-bg); color: var(--color-primary); }
.badge-success { background: var(--color-success-bg); color: #16a34a; }
.badge-warning { background: var(--color-warning-bg); color: #d97706; }
.badge-error { background: var(--color-error-bg); color: var(--color-error); }
.badge-gray { background: var(--color-border-light); color: var(--color-text-secondary); }

/* ── Spinner ── */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 3px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Progress Bar ── */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

/* ── Toast / Notifications ── */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.toast {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    font-size: var(--font-size-sm);
    animation: toastSlideIn 0.3s ease;
    max-width: 400px;
}
.toast-success { border-left: 3px solid var(--color-success); }
.toast-error { border-left: 3px solid var(--color-error); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.25rem;
    cursor: pointer;
    margin-left: 12px;
    vertical-align: middle;
    line-height: 1;
    opacity: 0.7;
}
.toast-close:hover { opacity: 1; }
@keyframes toastSlideIn {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ── Layout ── */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--space-6);
    z-index: 1000;
}
.app-header-logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.app-header-logo span {
    color: var(--color-text);
    font-weight: 400;
}
.app-header-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.app-content {
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    padding: var(--space-6);
}

.container {
    max-width: var(--max-content-width);
    margin: 0 auto;
}

/* ── Pages (SPA routing) ── */
.page {
    display: none;
}
.page.active {
    display: block;
}

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-6);
    color: var(--color-text-secondary);
}
.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}
.empty-state h3 {
    margin-bottom: var(--space-2);
    color: var(--color-text);
}
.empty-state p {
    margin-bottom: var(--space-6);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ── Utility ── */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.w-full { width: 100%; }
.text-center { text-align: center; }

/* ── Responsive ── */
@media (max-width: 768px) {
    :root {
        --space-6: 1rem;
    }

    .app-header {
        padding: 0 var(--space-4);
    }

    .btn-lg {
        padding: 12px 20px;
        font-size: var(--font-size-base);
    }
}