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

:root {
    --app-bg: #f3f4f6;
    --app-surface: #ffffff;
    --app-surface-soft: #f9fafb;
    --app-border: #e5e7eb;
    --app-text: #111827;
    --app-muted: #6b7280;
    --app-primary: #2563eb;
    --app-primary-dark: #1d4ed8;
    --app-success: #16a34a;
    --app-warning: #d97706;
    --app-danger: #dc2626;
    --app-dark: #0f172a;
    --app-radius: 16px;
    --app-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }

body.app-body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 32rem),
        linear-gradient(180deg, #f8fafc 0%, var(--app-bg) 100%);
    color: var(--app-text);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.app-shell {
    width: min(1240px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 48px;
}

.app-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(229, 231, 235, 0.9);
    box-shadow: var(--app-shadow);
    border-radius: 20px;
    padding: 16px 18px;
    position: sticky;
    top: 16px;
    z-index: 50;
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--app-primary), #7c3aed);
    color: #ffffff;
    display: grid;
    place-items: center;
    font-size: 22px;
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
}

.brand-title {
    margin: 0;
    color: #0f172a;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.brand-subtitle {
    margin: 2px 0 0;
    color: var(--app-muted);
    font-size: 12px;
    font-weight: 600;
}

.app-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
}

.app-link,
.app-button,
button.app-button,
a.app-button {
    min-height: 40px;
    border-radius: 12px;
    border: 1px solid var(--app-border);
    background: #ffffff;
    color: #111827;
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease, background .15s ease;
}

.app-link:hover,
.app-button:hover {
    transform: translateY(-1px);
    border-color: #bfdbfe;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.app-button-primary {
    background: var(--app-primary);
    color: #ffffff;
    border-color: var(--app-primary);
}

.app-button-success {
    background: var(--app-success);
    color: #ffffff;
    border-color: var(--app-success);
}

.app-button-danger {
    background: #fff1f2;
    color: var(--app-danger);
    border-color: #fecdd3;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
    margin-top: 22px;
}

.app-card {
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow);
    padding: 22px;
}

.app-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.app-card-title {
    margin: 0;
    font-size: 17px;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.02em;
}

.app-card-subtitle {
    margin: 5px 0 0;
    color: var(--app-muted);
    font-size: 13px;
    line-height: 1.5;
}

.span-12 { grid-column: span 12; }
.span-8 { grid-column: span 8; }
.span-6 { grid-column: span 6; }
.span-4 { grid-column: span 4; }
.span-3 { grid-column: span 3; }

.stats-card {
    min-height: 132px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stats-label {
    color: var(--app-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-weight: 800;
}

.stats-value {
    margin: 12px 0 0;
    font-size: 34px;
    color: #0f172a;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.stats-note {
    margin: 8px 0 0;
    color: var(--app-muted);
    font-size: 12px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.form-field { display: flex; flex-direction: column; gap: 8px; }

.form-field label,
.app-label {
    color: #374151;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.form-field input,
.form-field select,
.form-field textarea,
.app-input,
.app-select {
    width: 100%;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    min-height: 44px;
    padding: 11px 13px;
    font: inherit;
    font-size: 14px;
    color: #111827;
    background: #ffffff;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus,
.app-input:focus,
.app-select:focus {
    border-color: var(--app-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.upload-panel {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--app-surface-soft);
    border: 1px dashed #cbd5e1;
    border-radius: 16px;
    padding: 16px;
}

.logo-preview-modern {
    width: 88px;
    height: 88px;
    flex: 0 0 88px;
    border-radius: 22px;
    background: #ffffff;
    border: 1px solid var(--app-border);
    display: grid;
    place-items: center;
    overflow: hidden;
    color: var(--app-muted);
    font-size: 11px;
    text-align: center;
}

.logo-preview-modern img { width: 100%; height: 100%; object-fit: contain; }

.toolbar-modern {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    background: var(--app-surface-soft);
    border: 1px solid var(--app-border);
    border-radius: 16px;
    padding: 14px;
}

.record-pill,
.role-pill,
.status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 800;
    background: #eef2ff;
    color: #3730a3;
    border: 1px solid #c7d2fe;
}

.status-success { background: #ecfdf5; color: #047857; border-color: #bbf7d0; }
.status-warning { background: #fffbeb; color: #b45309; border-color: #fde68a; }
.status-danger { background: #fff1f2; color: #be123c; border-color: #fecdd3; }

.table-wrap {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--app-border);
    border-radius: 16px;
    background: #ffffff;
}

.app-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 860px;
}

.app-table th {
    background: #f8fafc;
    color: #475569;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
    text-align: left;
    padding: 13px 14px;
    border-bottom: 1px solid var(--app-border);
}

.app-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #f1f5f9;
    color: #111827;
    font-size: 13px;
    vertical-align: middle;
}

.app-table tr:last-child td { border-bottom: none; }
.app-table tbody tr:hover { background: #f8fafc; }

.student-input-table input {
    width: 100%;
    border: 1px solid transparent;
    background: transparent;
    border-radius: 10px;
    padding: 9px 10px;
    font-size: 13px;
    color: #111827;
    outline: none;
}

.student-input-table input:focus {
    border-color: #bfdbfe;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

.flash-message {
    border-radius: 14px;
    padding: 13px 15px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 16px;
}

.flash-success { background: #ecfdf5; color: #047857; border: 1px solid #bbf7d0; }
.flash-error { background: #fff1f2; color: #be123c; border: 1px solid #fecdd3; }

.login-page {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 24px;
}

.login-card-modern {
    width: min(440px, 100%);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(229, 231, 235, 0.9);
    box-shadow: 0 25px 70px rgba(15, 23, 42, 0.14);
    border-radius: 24px;
    padding: 30px;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: 20px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--app-primary), #7c3aed);
    color: #ffffff;
    font-size: 30px;
}

.empty-state {
    text-align: center;
    padding: 36px 18px;
    color: var(--app-muted);
}

.generated-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 22px;
    background: rgba(15, 23, 42, 0.58);
    backdrop-filter: blur(8px);
}

.generated-modal {
    width: min(520px, 100%);
    background: #ffffff;
    color: #111827;
    border-radius: 24px;
    padding: 28px;
    box-shadow: 0 35px 85px rgba(15, 23, 42, 0.34);
    border: 1px solid rgba(255,255,255,.7);
    text-align: center;
}

.generated-modal-icon {
    width: 74px;
    height: 74px;
    margin: 0 auto 16px;
    border-radius: 24px;
    display: grid;
    place-items: center;
    background: #ecfdf5;
    color: #16a34a;
    font-size: 34px;
}

.generated-modal h2 {
    margin: 0 0 8px;
    color: #0f172a;
    font-size: 24px;
    letter-spacing: -0.03em;
}

.generated-modal p {
    margin: 0 0 16px;
    color: #4b5563;
    line-height: 1.6;
    font-size: 14px;
}

.generated-modal-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

@media (max-width: 920px) {
    .span-8, .span-6, .span-4, .span-3 { grid-column: span 12; }
    .form-grid { grid-template-columns: 1fr; }
    .app-topbar { position: static; align-items: flex-start; flex-direction: column; }
    .app-nav { width: 100%; justify-content: flex-start; }
    .upload-panel { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
    .app-shell { width: min(100% - 20px, 1240px); padding-top: 10px; }
    .app-card { padding: 16px; }
    .brand-title { font-size: 17px; }
    .app-link, .app-button { width: 100%; }
    .toolbar-modern { align-items: stretch; }
    .toolbar-modern > * { width: 100%; }
}