/* ============================================================================
   Meeting Assistant — Design System
   ============================================================================
   This file defines the base design tokens and primitive component styles.
   Light theme is the default; [data-theme="dark"] overrides the tokens only,
   so all components inherit the correct values automatically.
*/

:root {
    /* --- Color tokens --- */
    --color-bg-primary: #f4f5f7;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f8f9fa;
    --color-bg-hover: #eef2f7;
    --color-bg-inset: #eef2f7;

    --color-text-primary: #1f2937;
    --color-text-secondary: #4b5563;
    --color-text-muted: #6b7280;
    --color-text-on-accent: #ffffff;

    --color-border: #e5e7eb;
    --color-border-strong: #d1d5db;
    --color-border-focus: #3b82f6;

    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-light: #dbeafe;
    --color-accent-soft: #eff6ff;

    --color-success: #16a34a;
    --color-success-hover: #15803d;
    --color-success-bg: #dcfce7;
    --color-success-text: #166534;

    --color-danger: #dc2626;
    --color-danger-hover: #b91c1c;
    --color-danger-bg: #fee2e2;
    --color-danger-text: #991b1b;

    --color-warning: #d97706;
    --color-warning-bg: #fef3c7;
    --color-warning-text: #92400e;

    --color-info-bg: #dbeafe;
    --color-info-text: #1e40af;

    /* --- Spacing scale (4px base) --- */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* --- Radius --- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-pill: 999px;

    /* --- Shadows --- */
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 2px 8px rgba(16, 24, 40, 0.08);
    --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.12);

    /* --- Typography scale --- */
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-md: 15px;
    --font-size-lg: 17px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;

    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;

    /* --- Motion --- */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --duration-fast: 120ms;
    --duration-normal: 220ms;

    /* --- Focus ring --- */
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #172033;
    --color-bg-hover: #26334d;
    --color-bg-inset: #0b1120;

    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-text-on-accent: #ffffff;

    --color-border: #334155;
    --color-border-strong: #475569;
    --color-border-focus: #60a5fa;

    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-light: #1e3a8a;
    --color-accent-soft: #172554;

    --color-success: #22c55e;
    --color-success-hover: #4ade80;
    --color-success-bg: #14532d;
    --color-success-text: #86efac;

    --color-danger: #ef4444;
    --color-danger-hover: #f87171;
    --color-danger-bg: #450a0a;
    --color-danger-text: #fca5a5;

    --color-warning: #f59e0b;
    --color-warning-bg: #451a03;
    --color-warning-text: #fcd34d;

    --color-info-bg: #1e3a8a;
    --color-info-text: #bfdbfe;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);

    --focus-ring: 0 0 0 3px rgba(96, 165, 250, 0.4);
}

/* ============================================================================
   Base
   ===========================================================================*/
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    direction: rtl;
    line-height: 1.6;
    font-size: var(--font-size-md);
    transition: background var(--duration-normal), color var(--duration-normal);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

/* --- Focus visibility (a11y) --- */
:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--radius-sm);
}

/* --- Typography helpers --- */
.h1, h1 { font-size: var(--font-size-3xl); font-weight: var(--font-weight-bold); }
.h2, h2 { font-size: var(--font-size-xl); font-weight: var(--font-weight-bold); }
.h3, h3 { font-size: var(--font-size-lg); font-weight: var(--font-weight-bold); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-small { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }

/* ltr snippet inside rtl layout (file names, urls) */
.ltr { direction: ltr; unicode-bidi: isolate; }

/* ============================================================================
   Layout primitives
   ===========================================================================*/
.container {
    max-width: 920px;
    margin: 0 auto;
    padding: var(--space-6);
}

.card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ============================================================================
   Buttons
   ===========================================================================*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: inherit;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    padding: var(--space-2) var(--space-5);
    min-height: 42px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background var(--duration-fast), border-color var(--duration-fast),
                color var(--duration-fast), transform var(--duration-fast), box-shadow var(--duration-fast);
    line-height: 1;
    user-select: none;
}

.btn:active { transform: translateY(1px); }
.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

/* Primary */
.btn--primary {
    background: var(--color-accent);
    color: var(--color-text-on-accent);
}
.btn--primary:hover:not(:disabled) { background: var(--color-accent-hover); }

/* Secondary (outline / ghost signifiers) */
.btn--secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border-color: var(--color-border-strong);
}
.btn--secondary:hover:not(:disabled) { background: var(--color-bg-hover); }

/* Ghost — lowest visual weight, for non-critical actions */
.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}
.btn--ghost:hover:not(:disabled) { background: var(--color-bg-hover); color: var(--color-text-primary); }

/* Destructive */
.btn--danger {
    background: var(--color-bg-secondary);
    color: var(--color-danger);
    border-color: var(--color-border-strong);
}
.btn--danger:hover:not(:disabled) { background: var(--color-danger-bg); border-color: var(--color-danger); }

/* ============================================================================
   Status badges
   ===========================================================================*/
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 2px var(--space-2);
    border-radius: var(--radius-pill);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1.6;
}
.badge--success { background: var(--color-success-bg); color: var(--color-success-text); }
.badge--warning { background: var(--color-warning-bg); color: var(--color-warning-text); }
.badge--danger  { background: var(--color-danger-bg);  color: var(--color-danger-text); }
.badge--info    { background: var(--color-info-bg);    color: var(--color-info-text); }
.badge--muted   { background: var(--color-bg-inset);   color: var(--color-text-muted); }

/* ============================================================================
   Status / alert blocks
   ===========================================================================*/
.status {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin: var(--space-3) 0;
    font-size: var(--font-size-sm);
}
.status--loading { background: var(--color-warning-bg); color: var(--color-warning-text); }
.status--success { background: var(--color-success-bg); color: var(--color-success-text); }
.status--error   { background: var(--color-danger-bg);  color: var(--color-danger-text); }
.status--info    { background: var(--color-info-bg);    color: var(--color-info-text); }

/* ============================================================================
   Form controls
   ===========================================================================*/
.input, textarea {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    transition: border-color var(--duration-fast), box-shadow var(--duration-fast), background var(--duration-normal);
}
.input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: var(--focus-ring);
}
textarea { min-height: 80px; resize: vertical; }

.input--invalid {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.field-error {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--space-1);
}

/* ============================================================================
   Toast
   ===========================================================================*/
.toast-stack {
    position: fixed;
    bottom: var(--space-5);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    z-index: 1100;
    pointer-events: none;
    align-items: center;
}

.toast {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    color: #fff;
    font-size: var(--font-size-sm);
    box-shadow: var(--shadow-lg);
    animation: toastIn var(--duration-normal) var(--ease-out);
    max-width: 90vw;
}
.toast--success { background: var(--color-success); }
.toast--error   { background: var(--color-danger); }
.toast--info    { background: var(--color-text-secondary); }

@keyframes toastIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.toast.toast--out { opacity: 0; transform: translateY(12px); transition: all var(--duration-normal); }

/* ============================================================================
   Utilities
   ===========================================================================*/
.hidden { display: none !important; }

.btn-group {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.btn-group--stacked { flex-direction: column; }

.skeleton {
    background: linear-gradient(90deg, var(--color-bg-inset) 25%, var(--color-bg-hover) 50%, var(--color-bg-inset) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    border-radius: var(--radius-sm);
}
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Progress bar */
.progress {
    width: 100%;
    height: 6px;
    background: var(--color-bg-inset);
    border-radius: var(--radius-pill);
    overflow: hidden;
}
.progress__bar {
    height: 100%;
    background: var(--color-accent);
    border-radius: var(--radius-pill);
    transition: width var(--duration-normal) var(--ease-out);
}
.progress__bar--indeterminate {
    width: 100% !important;
    animation: indeterminate 1.4s infinite;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover), var(--color-accent));
    background-size: 200% 100%;
}
@keyframes indeterminate {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Divider with "یا" label */
.divider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin: var(--space-5) 0;
}
.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* ============================================================================
   Responsive
   ===========================================================================*/
@media (max-width: 768px) {
    .container { padding: var(--space-4); }
    .card { padding: var(--space-4); }
}

/* Honor reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}