:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    margin-bottom: 2rem;
    text-align: center;
}

/* Top Navigation Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.top-bar-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
}

.logo h1 {
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 1rem;
}

/* Controls */
.controls-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-main);
}

select {
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: #fff;
    font-size: 1rem;
    color: var(--text-main);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}

select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

select:disabled {
    background-color: #f1f5f9;
    cursor: not-allowed;
    opacity: 0.7;
}

/* Timetable Section */
#timetable-container {
    animation: fadeIn 0.4s ease-out;
}

.timetable-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.timetable-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.btn-secondary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    color: var(--text-main);
}

.btn-secondary:hover {
    background: #f8fafc;
}

/* Table */
.table-wrapper {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background-color: #f8fafc;
    padding: 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border);
}

td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    font-size: 0.9375rem;
}

tr:last-child td {
    border-bottom: none;
}

td:first-child {
    font-weight: 700;
    color: var(--primary);
    background-color: #f8fafc;
    width: 140px;
}

.subject-cell {
    transition: transform 0.2s;
}

.subject-cell:hover {
    color: var(--primary-light);
}

/* Mobile Cards */
.mobile-cards {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
}

.day-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border);
}

.day-card-header {
    background: var(--primary);
    color: white;
    padding: 0.75rem 1rem;
    font-weight: 700;
}

.period-list {
    display: flex;
    flex-direction: column;
}

.period-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.period-item:last-child {
    border-bottom: none;
}

.period-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 600;
}

.period-subject {
    font-weight: 700;
    color: var(--text-main);
}

/* States */
.hidden {
    display: none !important;
}

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-icon {
    margin-bottom: 1.5rem;
    color: var(--border);
}

.empty-state h3 {
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

/* Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
footer {
    margin-top: auto;
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .controls-card {
        grid-template-columns: 1fr;
    }

    .table-wrapper {
        display: none;
    }

    .mobile-cards {
        display: flex;
    }

    .timetable-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    #print-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Daily Inspiration Card */
.inspiration-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
    text-align: center;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInInspiration 0.5s ease-out forwards;
}

@keyframes fadeInInspiration {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.inspiration-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.inspiration-icon {
    font-size: 1.25rem;
}

.inspiration-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
}

.inspiration-text {
    font-size: 0.9375rem;
    color: var(--text-main);
    font-style: italic;
    min-height: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
}

.small-spinner {
    width: 24px;
    height: 24px;
    border-width: 3px;
    margin-bottom: 0.5rem;
}

@media print {

    #daily-inspiration,
    .controls-card,
    footer,
    #print-btn,
    .empty-state,
    .mobile-cards {
        display: none !important;
    }

    body {
        background: white;
    }

    .app-container {
        padding: 0;
        max-width: 100%;
    }

    .table-wrapper {
        display: block !important;
        box-shadow: none;
        border: 1px solid black;
    }

    th,
    td {
        border: 1px solid black;
    }
}