/* ============================================
   SAP 2026 - Mérito Pré-vestibulares
   Design System & Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
    --color-primary: #DC2626;
    --color-primary-dark: #991B1B;
    --color-primary-light: #fef2f2;
    --color-primary-hover: #b91c1c;
    --color-text: #1f2937;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    --color-bg: #f9fafb;
    --color-white: #ffffff;
    --color-success: #16a34a;
    --color-success-light: #f0fdf4;
    --color-error: #DC2626;
    --color-error-light: #fef2f2;
    --color-info: #2563eb;
    --color-info-light: #eff6ff;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.03);
    --shadow-header: 0 1px 0 rgba(0, 0, 0, 0.06);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;

    --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, 'Consolas', 'Liberation Mono', Menlo, monospace;

    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1024px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-stack);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-border-light);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1rem;
}

.main {
    flex: 1;
    padding: 2rem 0;
}

/* --- Header --- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    box-shadow: var(--shadow-header);
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.92);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--color-text);
}

.header-logo {
    width: 80px;
    height: 32px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
}

.header-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.header-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    letter-spacing: -0.01em;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-greeting {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.header-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.header-link:hover {
    color: var(--color-primary);
}

/* --- Footer --- */
.footer {
    padding: 1.5rem 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

/* --- Card --- */
.card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    transition: box-shadow var(--transition);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: var(--font-stack);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-secondary {
    background: var(--color-white);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border-light);
    color: var(--color-text);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-ghost:hover {
    background: var(--color-border-light);
    color: var(--color-text);
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: 0.4375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-xs {
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
}

.btn-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn-danger-text {
    color: var(--color-error);
}

.btn-danger-text:hover {
    background: var(--color-error-light);
    color: var(--color-error);
}

.btn-success-text {
    color: var(--color-success);
}

.btn-success-text:hover {
    background: var(--color-success-light);
    color: var(--color-success);
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.375rem;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    font-family: var(--font-stack);
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

.form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:disabled,
.form-select:disabled {
    background: var(--color-border-light);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.form-file {
    padding: 0.5rem;
}

.form-row {
    display: grid;
    gap: 1rem;
}

.inline-form {
    display: inline;
}

/* --- Flash Messages --- */
.flash-container {
    margin-bottom: 1.5rem;
}

.flash-message {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 450;
    margin-bottom: 0.5rem;
    animation: flashIn 300ms ease-out;
}

.flash-message.hiding {
    animation: flashOut 300ms ease-in forwards;
}

.flash-error {
    background: var(--color-error-light);
    color: var(--color-error);
    border: 1px solid rgba(220, 38, 38, 0.15);
}

.flash-success {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid rgba(22, 163, 74, 0.15);
}

.flash-info {
    background: var(--color-info-light);
    color: var(--color-info);
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.flash-dismiss {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.6;
    padding: 0 0.25rem;
    line-height: 1;
    transition: opacity var(--transition);
}

.flash-dismiss:hover {
    opacity: 1;
}

@keyframes flashIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes flashOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-8px);
    }
}

/* --- Badge --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15em 0.6em;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    line-height: 1.5;
}

.badge-turma {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-active {
    background: var(--color-success-light);
    color: var(--color-success);
}

.badge-inactive {
    background: var(--color-border-light);
    color: var(--color-text-muted);
}

/* ============================================
   Page: Login
   ============================================ */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 56px - 72px - 4rem);
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-logo {
    width: 160px;
    margin: 0 auto 1.5rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.login-logo img {
    width: 100%;
    height: auto;
    display: block;
}

.login-title {
    font-size: 1.375rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 1.75rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.login-form .form-group:last-of-type {
    margin-bottom: 1.5rem;
}

.login-footer {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ============================================
   Page: Dashboard (Student)
   ============================================ */
.dashboard-header {
    margin-bottom: 2rem;
}

.dashboard-greeting {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text);
}

.dashboard-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

.reports-grid {
    display: grid;
    gap: 1rem;
}

.report-card {
    border-left: 3px solid var(--color-primary);
    padding: 1.25rem 1.5rem;
}

.report-card-header {
    margin-bottom: 1rem;
}

.report-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.report-card-actions {
    display: flex;
    gap: 0.75rem;
}

.report-card-actions .btn {
    font-size: 0.8125rem;
    padding: 0.5rem 1rem;
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--color-text-muted);
}

.empty-state-icon {
    margin-bottom: 1rem;
    opacity: 0.4;
}

.empty-state-text {
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.empty-state-hint {
    font-size: 0.875rem;
}

/* ============================================
   Page: Admin Dashboard
   ============================================ */
.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin-bottom: 1.5rem;
}

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

.page-header .page-title {
    margin-bottom: 0;
}

.section-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.stats-grid {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    text-align: center;
    padding: 1.25rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

.quick-links {
    display: grid;
    gap: 1rem;
}

.quick-link-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition);
}

.quick-link-card:hover {
    box-shadow: var(--shadow-lg);
    color: var(--color-text);
    transform: translateY(-1px);
}

.quick-link-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.quick-link-text {
    font-weight: 500;
    font-size: 0.9375rem;
}

/* ============================================
   Page: Admin Alunos
   ============================================ */
.turma-filter {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
}

.turma-tab {
    padding: 0.4375rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: var(--font-stack);
    border: 1px solid var(--color-border);
    border-radius: 9999px;
    background: var(--color-white);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.turma-tab:hover {
    background: var(--color-border-light);
}

.turma-tab.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.table-card {
    padding: 0;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.table-responsive {
    overflow-x: auto;
}

.student-table {
    width: 100%;
    border-collapse: collapse;
}

.student-table th {
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-border-light);
}

.student-table td {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--color-border);
}

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

.student-table tr:hover td {
    background: var(--color-border-light);
}

.action-buttons {
    display: flex;
    gap: 0.375rem;
}

.student-cards {
    display: none;
}

.student-mobile-card {
    margin-bottom: 0.75rem;
}

.student-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.student-mobile-status {
    margin-bottom: 0.75rem;
}

.student-mobile-actions {
    display: flex;
    gap: 0.5rem;
    border-top: 1px solid var(--color-border);
    padding-top: 0.75rem;
}

.form-section {
    margin-bottom: 1.5rem;
}

.form-section .section-title {
    margin-bottom: 1.25rem;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* --- Edit info --- */
.edit-info {
    margin-bottom: 1.25rem;
    padding: 0.75rem 1rem;
    background: var(--color-border-light);
    border-radius: var(--radius-sm);
}

/* ============================================
   Responsive
   ============================================ */

/* Mobile (< 640px) */
@media (max-width: 639px) {
    .main {
        padding: 1.25rem 0;
    }

    .login-card {
        box-shadow: none;
        border: 1px solid var(--color-border);
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .quick-links {
        grid-template-columns: 1fr;
    }

    /* Hide table, show cards on mobile */
    .table-card {
        display: none;
    }

    .student-cards {
        display: block;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .report-card-actions {
        flex-direction: column;
    }

    .report-card-actions .btn {
        width: 100%;
    }

    .dashboard-greeting {
        font-size: 1.375rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

/* Tablet (640px - 1024px) */
@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }

    .reports-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .quick-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop (> 1024px) */
@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }

    .reports-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .form-row {
        grid-template-columns: repeat(3, 1fr);
    }
}