/* Design Stylesheet Proyek Siswa */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-page: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text-heading: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --radius: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-body);
    line-height: 1.5;
    padding: 2rem 1rem;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.app-header h1 {
    font-size: 1.85rem;
    color: var(--text-heading);
    font-weight: 700;
}

.app-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Buttons */
.btn {
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-body);
}

.btn-outline:hover {
    background-color: #f1f5f9;
}

.btn-danger {
    background-color: #ef4444;
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

/* Stats Row */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 1.25rem;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-top: 0.25rem;
}

.text-blue { color: #2563eb; }
.text-pink { color: #db2777; }

/* Filter Card */
.filter-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    align-items: flex-end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
}

input, select, textarea {
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
    font-family: inherit;
    transition: border-color 0.15s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    text-align: center;
}

.alert.info {
    background-color: #e0e7ff;
    color: #3730a3;
}

.alert.danger {
    background-color: #fee2e2;
    color: #991b1b;
}

/* Students Grid */
.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.student-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
    transition: transform 0.2s, box-shadow 0.2s;
}

.student-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.card-top {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.card-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}

.card-top h3 {
    font-size: 1.1rem;
    color: var(--text-heading);
}

.nis-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    background: #f1f5f9;
    color: #475569;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.2rem;
}

.card-body {
    font-size: 0.875rem;
    color: var(--text-body);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    border-top: 1px solid var(--border);
    padding-top: 0.75rem;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.jurusan-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    background: #eef2ff;
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    max-height: 90vh;
    overflow-y: auto;
}

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

.btn-close {
    background: none;
    border: none;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
}