:root {
    --navy: #0b1130;
    --navy-light: #131a44;
    --cyan: #38e8f0;
    --cyan-dark: #1fb9c4;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #1c2333;
    --muted: #6b7280;
    --border: #e2e5ec;
    --danger: #e14b4b;
    --warning: #f0a93a;
    --success: #2fbf71;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--navy);
    color: #fff;
    padding: 14px 28px;
}

.navbar-brand { font-weight: 700; letter-spacing: .3px; display: flex; align-items: center; gap: 8px; }
.brand-mark { color: var(--cyan); }
.brand-accent { color: var(--cyan); font-weight: 800; }

.navbar-links a { color: #cdd3e6; margin-left: 22px; font-weight: 500; }
.navbar-links a:hover { color: var(--cyan); text-decoration: none; }

.app-main { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; }

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, var(--navy) 0%, var(--navy-light) 100%);
}

.auth-card {
    background: var(--card);
    padding: 36px 34px;
    border-radius: var(--radius);
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 50px rgba(0,0,0,.25);
}

.auth-card h1 { font-size: 20px; margin: 0 0 4px; }
.auth-card .subtitle { color: var(--muted); font-size: 14px; margin-bottom: 20px; }

.auth-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 18px;
}
.auth-brand .brand-mark { color: var(--cyan-dark); }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.field input, .field select, .field textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
}
.field input:focus, .field select:focus, .field textarea:focus {
    outline: none;
    border-color: var(--cyan-dark);
    box-shadow: 0 0 0 3px rgba(56,232,240,.2);
}
.field-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.btn {
    display: inline-block;
    background: var(--navy);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.btn:hover { background: var(--navy-light); }
.btn-accent { background: var(--cyan-dark); }
.btn-accent:hover { background: var(--cyan); color: var(--navy); }
.btn-danger { background: var(--danger); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.form-footer { margin-top: 16px; font-size: 13px; color: var(--muted); text-align: center; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #e6faf0; color: #14803c; border: 1px solid #b9f0d3; }
.alert-error { background: #fdeaea; color: #b3261e; border: 1px solid #f6c6c6; }
.alert-info { background: #e8f6fb; color: #0d6c85; border: 1px solid #bfe8f2; }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
.page-header h1 { font-size: 22px; margin: 0; }

.tabs { display: flex; gap: 6px; margin-bottom: 20px; }
.tab-link {
    padding: 8px 16px;
    border-radius: 8px;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    font-size: 13px;
}
.tab-link.active { background: var(--navy); color: #fff; border-color: var(--navy); }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }

.board-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.board-column { background: var(--card); border-radius: var(--radius); border: 1px solid var(--border); padding: 14px; }
.board-column h3 { font-size: 14px; margin: 0 0 12px; display: flex; justify-content: space-between; }

.task-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-left: 4px solid var(--cyan-dark);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 10px;
    font-size: 13px;
}
.task-card.priority-alta { border-left-color: var(--danger); }
.task-card.priority-media { border-left-color: var(--warning); }
.task-card.priority-baja { border-left-color: var(--success); }
.task-card .task-title { font-weight: 600; margin-bottom: 4px; }
.task-card .task-meta { color: var(--muted); font-size: 12px; display: flex; justify-content: space-between; align-items: center; }
.task-card .task-actions { margin-top: 8px; display: flex; gap: 6px; }
.task-card.overdue { border-left-color: var(--danger); background: #fff5f5; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 700; }
.badge-alta { background: #fdeaea; color: var(--danger); }
.badge-media { background: #fff3e0; color: #b9740a; }
.badge-baja { background: #e6faf0; color: var(--success); }

#calendar { background: #fff; border-radius: var(--radius); border: 1px solid var(--border); padding: 16px; }

.empty-state { text-align: center; color: var(--muted); padding: 40px 0; }

.settings-section { margin-bottom: 28px; }
.settings-section h2 { font-size: 16px; margin-bottom: 12px; }
.code-box {
    background: var(--navy);
    color: var(--cyan);
    padding: 10px 14px;
    border-radius: 8px;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 15px;
    letter-spacing: 1px;
    display: inline-block;
}
.checkbox-row { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.checkbox-row input { width: auto; }

@media (max-width: 720px) {
    .board-columns { grid-template-columns: 1fr; }
    .navbar { flex-direction: column; align-items: flex-start; gap: 10px; }
    .navbar-links a { margin-left: 0; margin-right: 16px; }
}