/**
 * Google Calendar MCP — Web Interface
 * Adaptive light/dark theme via prefers-color-scheme
 */

/* ── Light theme (default) ────────────────────── */
:root {
    /* Backgrounds */
    --bg-base: #f7f8fb;
    --bg-surface: #ffffff;
    --bg-elevated: #f0f2f8;
    --bg-hover: #e6e9f2;

    /* Text */
    --text-primary: #1c1e2e;
    --text-secondary: #5a5d70;
    --text-muted: #8f92a4;

    /* Borders */
    --border-subtle: rgba(0, 0, 0, 0.05);
    --border-default: rgba(0, 0, 0, 0.09);
    --border-hover: rgba(0, 0, 0, 0.15);

    /* Accent */
    --accent-primary: #6366f1;
    --accent-primary-hover: #4f46e5;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a78bfa 100%);
    --accent-glow: rgba(99, 102, 241, 0.18);

    /* Semantic */
    --success: #16a34a;
    --success-bg: rgba(22, 163, 74, 0.07);
    --success-border: rgba(22, 163, 74, 0.2);
    --warning: #d97706;
    --warning-bg: rgba(217, 119, 6, 0.07);
    --warning-border: rgba(217, 119, 6, 0.2);
    --danger: #dc2626;
    --danger-bg: rgba(220, 38, 38, 0.05);
    --danger-border: rgba(220, 38, 38, 0.15);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.09);

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

/* ── Dark theme ───────────────────────────────── */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-base: #0b0c10;
        --bg-surface: #13141c;
        --bg-elevated: #1b1c28;
        --bg-hover: #232536;

        --text-primary: #e2e4e9;
        --text-secondary: #8e91a4;
        --text-muted: #555770;

        --border-subtle: rgba(255, 255, 255, 0.04);
        --border-default: rgba(255, 255, 255, 0.07);
        --border-hover: rgba(255, 255, 255, 0.13);

        --accent-primary: #818cf8;
        --accent-primary-hover: #a5b4fc;
        --accent-glow: rgba(99, 102, 241, 0.25);

        --success: #34d399;
        --success-bg: rgba(52, 211, 153, 0.08);
        --success-border: rgba(52, 211, 153, 0.18);
        --warning: #fbbf24;
        --warning-bg: rgba(251, 191, 36, 0.08);
        --warning-border: rgba(251, 191, 36, 0.18);
        --danger: #f87171;
        --danger-bg: rgba(248, 113, 113, 0.06);
        --danger-border: rgba(248, 113, 113, 0.16);

        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
        --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.35);
        --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.45);
    }
}

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

/* ── Base ─────────────────────────────────────── */
body {
    font-family: 'Figtree', system-ui, -apple-system, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated gradient accent bar */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #6366f1, #a78bfa, #f0abfc, #818cf8);
    background-size: 300% 100%;
    animation: gradientShift 8s ease infinite;
    z-index: 1000;
}

/* Centered layout (auth popups) */
body.centered {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background:
        radial-gradient(ellipse at 30% 60%, rgba(99, 102, 241, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 30%, rgba(167, 139, 250, 0.03) 0%, transparent 60%),
        var(--bg-base);
}

/* ── Card ─────────────────────────────────────── */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 2.25rem 2.75rem;
    box-shadow: var(--shadow-lg);
    min-width: 380px;
    max-width: 540px;
    text-align: center;
    animation: fadeInUp 0.45s ease both;
}

/* ── Typography ───────────────────────────────── */
h1 {
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-weight: 700;
    font-size: 1.85rem;
    letter-spacing: -0.025em;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

h1.success { color: var(--success); }
h1.error   { color: var(--danger); }

p {
    color: var(--text-secondary);
    margin: 0.6rem 0;
    font-size: 0.95rem;
}

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

code {
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    padding: 0.15em 0.45em;
    border-radius: 5px;
    font-size: 0.85em;
    color: var(--accent-primary);
    font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
}

/* ── Info / Error boxes ───────────────────────── */
.info-box {
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin: 1.25rem 0;
}
.info-box p { margin: 0.35rem 0; }

.error-box {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    color: var(--danger);
    font-size: 0.88rem;
    word-break: break-word;
}

/* ── Links ────────────────────────────────────── */
a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--accent-primary-hover);
    text-decoration: underline;
}

/* ── Buttons ──────────────────────────────────── */
button, .btn, .btn-primary, .btn-danger, .btn-warning {
    padding: 0.65rem 1.3rem;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    text-decoration: none;
    background: var(--bg-elevated);
    color: var(--text-secondary);
}
button:hover, .btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 2px 12px var(--accent-glow);
}
.btn-primary:hover {
    box-shadow: 0 4px 20px var(--accent-glow);
    transform: translateY(-1px);
    filter: brightness(1.08);
    color: #fff;
    text-decoration: none;
    border-color: transparent;
}

.btn-danger {
    background: transparent;
    color: var(--text-muted);
}
.btn-danger:hover {
    color: var(--danger);
    border-color: var(--danger-border);
    background: var(--danger-bg);
}

.btn-warning {
    background: transparent;
    color: var(--warning);
    border-color: var(--warning-border);
}
.btn-warning:hover {
    background: var(--warning-bg);
}

/* ── Forms ────────────────────────────────────── */
.form-group { flex: 1; }

label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

input[type="text"] {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--bg-base);
    color: var(--text-primary);
    transition: all 0.2s ease;
}
input[type="text"]::placeholder { color: var(--text-muted); }
input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

/* ── Notifications ────────────────────────────── */
.message-error {
    background: var(--danger-bg);
    color: var(--danger);
    padding: 0.7rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.85rem;
    border: 1px solid var(--danger-border);
    animation: fadeInUp 0.25s ease;
}

.message-success {
    background: var(--success-bg);
    color: var(--success);
    padding: 0.7rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.85rem;
    border: 1px solid var(--success-border);
    animation: fadeInUp 0.25s ease;
}

/* ── Utility states ───────────────────────────── */
.loading {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-muted);
    font-size: 0.88rem;
    animation: pulse 1.8s ease-in-out infinite;
}

.empty-state {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* ── Animations ───────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 0.8; }
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}