/* ===== CardFlow Theme — Light (default) + Dark ===== */

/* --- Light Mode (Default) --- */
:root {
    --bg-base: #FAFBFC;
    --bg-card: #FFFFFF;
    --bg-elevated: #F1F5F9;
    --bg-hover: #E2E8F0;
    --accent: #0B7E74;
    --accent-light: #0F766E;
    --accent-glow: rgba(11,126,116,.15);
    --accent-subtle: rgba(11,126,116,.08);
    --accent-surface: rgba(11,126,116,.1);
    --success: #059669;
    --warning: #D97706;
    --danger: #DC2626;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #607085;
    --border: #E2E8F0;
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.07);
    --bg-sticky: rgba(250,251,252,.95);
    --accent-secondary: #0F766E;

    /* Glass */
    --glass-bg: rgba(0,0,0,.02);
    --glass-border: rgba(0,0,0,.06);
    --glass-hover: rgba(0,0,0,.08);
    --glass-text: rgba(0,0,0,.5);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
    --bg-base: #0F1117;
    --bg-card: #1A1D27;
    --bg-elevated: #242836;
    --bg-hover: #2E3345;
    --accent: #14B8A6;
    --accent-light: #2DD4BF;
    --accent-glow: rgba(20,184,166,.25);
    --accent-subtle: rgba(20,184,166,.08);
    --accent-surface: rgba(20,184,166,.12);
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border: #2E3345;
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.3);
    --bg-sticky: rgba(15,17,23,.95);
    --accent-secondary: #2DD4BF;

    /* Glass */
    --glass-bg: rgba(255,255,255,.03);
    --glass-border: rgba(255,255,255,.08);
    --glass-hover: rgba(255,255,255,.12);
    --glass-text: rgba(255,255,255,.5);
}

/* --- Shared Reset --- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { height:100%; min-height:100vh; min-height:-webkit-fill-available; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    line-height: 1.5;
    overflow-x: hidden;
}

/* --- Theme Toggle Button --- */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-elevated);
    cursor: pointer;
    transition: background .2s, border-color .2s;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.theme-toggle:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--accent);
}
.theme-toggle svg { width: 18px; height: 18px; }

/* Sun icon hidden in light, shown in dark */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* --- Toast Notifications --- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 20px;
    font-size: 14px;
    box-shadow: var(--shadow-md);
    z-index: 10000;
    opacity: 0;
    transition: opacity .3s, transform .3s;
    pointer-events: none;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast.toast-success { border-left: 3px solid var(--success); }
.toast.toast-error { border-left: 3px solid var(--danger); }
.toast.toast-warning { border-left: 3px solid var(--warning); }

/* --- Scrollbar (dark mode aware) --- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--glass-hover); }