/* ========== Design Tokens ========== */
:root {
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #eef2ff;
    --color-bg: #f5f3f0;
    --color-surface: #ffffff;
    --color-border: #e5e2dd;
    --color-text: #1c1917;
    --color-text-muted: #78716c;
    --color-text-light: #a8a29e;
    --color-danger: #dc2626;

    --font-heading: 'DM Sans', system-ui, sans-serif;
    --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
[x-cloak] { display: none !important; }

/* ========== Nav ========== */
.nav {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 20px;
    height: 48px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}
.nav-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 15px;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.3px;
}
.nav-sep { color: var(--color-text-light); }
.nav-actions { margin-left: auto; display: flex; gap: 8px; }

/* ========== Container ========== */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 20px;
}

/* ========== Card ========== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    font-family: var(--font-sans);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
    border-color: var(--color-border);
}
.btn-ghost:hover:not(:disabled) { background: var(--color-bg); }

.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ========== Login Page ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-md);
    text-align: center;
}
.login-card h1 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}
.login-card .subtitle {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 32px;
}
.btn-google {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-sans);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.15s;
}
.btn-google:hover { background: var(--color-bg); box-shadow: var(--shadow-sm); }
.btn-google:active { transform: scale(0.98); }
.btn-google svg { flex-shrink: 0; }

.login-error {
    margin-top: 16px;
    padding: 10px 16px;
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
    border-radius: var(--radius-md);
    font-size: 13px;
    display: none;
}
.login-error.active { display: block; }

.login-footer {
    margin-top: 24px;
    font-size: 12px;
    color: var(--color-text-light);
}

/* ========== Home Page ========== */
.home-card {
    text-align: center;
    max-width: 480px;
    margin: 0 auto;
}
.home-card h2 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.3px;
}
.home-card .user-email {
    color: var(--color-text-muted);
    font-size: 13px;
    margin-bottom: 24px;
}
.home-card p {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 16px;
}

/* ========== Utilities ========== */
.text-muted { color: var(--color-text-muted); }