@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --bg: #0f172a;
    --primary: #2563eb;
    --accent: #06b6d4;
    --glass: rgba(255, 255, 255, 0.06);
    --glass2: rgba(255, 255, 255, 0.04);
    --border: rgba(255, 255, 255, 0.08);
    --text: #ffffff;
    --muted: #94a3b8;
    --shadow: 0 15px 40px rgba(0, 0, 0, 0.35);
    --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: radial-gradient(circle at top left, #1d4ed8 0%, transparent 30%), radial-gradient(circle at bottom right, #06b6d4 0%, transparent 30%), var(--bg);
    min-height: 100vh;
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.5;
}

/* LAYOUT */
.dashboard,
.container {
    display: flex;
    min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
    width: 280px;
    background: var(--glass);
    backdrop-filter: blur(30px);
    border-right: 1px solid var(--border);
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: sticky;
    top: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 35px;
}

.logo i,
.logo-icon {
    width: 58px;
    height: 58px;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 22px;
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
    transition: 0.3s ease;
}

.logo h2 {
    font-size: 26px;
    font-weight: 800;
}

.menu {
    list-style: none;
    margin-top: 10px;
}

.menu li {
    padding: 14px 16px;
    margin-bottom: 10px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    color: var(--muted);
    transition: all 0.25s ease;
    position: relative;
}

.menu li:hover,
.menu .active {
    color: white;
    transform: translateX(6px);
    background: rgba(37, 99, 235, 0.18);
}

.logout-btn {
    border: none;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    padding: 15px;
    border-radius: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.25s ease;
}

.logout-btn:hover {
    transform: translateY(-3px);
}

/* MAIN */
.main-content,
.content {
    flex: 1;
    padding: 32px;
}

/* TOPBAR */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.welcome h1 {
    font-size: 36px;
    font-weight: 900;
}

.welcome p {
    color: var(--muted);
}

.profile,
.profile-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 16px;
    background: var(--glass);
    border: 1px solid var(--border);
}

/* HERO */
.hero {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(6, 182, 212, 0.75));
    border-radius: 28px;
    padding: 38px;
    margin-bottom: 28px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.hero h2 {
    font-size: 34px;
    font-weight: 800;
}

.hero p {
    width: 55%;
    color: #e2e8f0;
}

/* GRID */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
}

/* BOX */
.form-box,
.table-box {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 22px;
    backdrop-filter: blur(30px);
    box-shadow: var(--shadow-soft);
}

/* INPUT */
.input-group {
    margin-bottom: 16px;
}

.input-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 13px 14px;
    border-radius: 12px;
    border: 1px solid transparent;
    background: var(--glass2);
    color: white;
    outline: none;
}

/* BUTTON */
.take-btn,
.edit-btn,
.delete-btn,
.submit-btn {
    border: none;
    padding: 11px 14px;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    color: white;
}

.take-btn,
.edit-btn,
.submit-btn {
    background: linear-gradient(135deg, var(--primary), var(--accent));
}

.delete-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

/* STAT CARD FIX (QUAN TRỌNG) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.stat-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    transition: 0.25s ease;
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card i {
    font-size: 36px;
    color: var(--accent);
}

/* SCHEDULE */
#scheduleList,
#historyList {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.schedule-card {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: 0.25s ease;
}

.schedule-card:hover {
    transform: translateY(-4px);
    border-color: rgba(6, 182, 212, 0.3);
}

/* STATUS */
.status {
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
}

.pending {
    background: rgba(251, 191, 36, 0.15);
    color: #facc15;
}

.done {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
}

/* RESPONSIVE */
@media (max-width:1100px) {
    .sidebar {
        display: none;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width:700px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .hero p {
        width: 100%;
    }
}

.tab-content {
    display: none;
}

.tab-content.active-tab {
    display: block;
}