/* ======================================
   NeatPad - CSS
   ====================================== */

/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ── Light Mode (default) ────────────── */
:root {
    --touch-min: 44px;
    --safe-top: env(safe-area-inset-top, 0);
    --safe-bottom: env(safe-area-inset-bottom, 0);
    --safe-left: env(safe-area-inset-left, 0);
    --safe-right: env(safe-area-inset-right, 0);
    --primary-color: #6C63FF;
    --primary-hover: #5A52E0;
    --secondary-color: #1B1830;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #9b59b6;

    --bg-body: linear-gradient(145deg, #E8E3FF 0%, #F4F0EB 40%, #FFF3DC 100%);
    --bg-header: rgba(255,255,255,0.88);
    --bg-card: #ffffff;
    --bg-input: #FAFAF9;
    --bg-badge: #F4F0EB;
    --bg-modal-overlay: rgba(0,0,0,0.45);

    --text-primary: #1B1830;
    --text-secondary: #6B6988;
    --text-section: #3D3960;
    --text-on-bg: #1B1830;

    --border-color: #EAE6DF;
    --border-header: #EAE6DF;
    --header-shadow: 0 2px 16px rgba(108,99,255,0.07);

    --white: #ffffff;
    --shadow: 0 2px 10px rgba(27,24,48,0.06);
    --shadow-hover: 0 8px 24px rgba(108,99,255,0.12);
    --border-radius: 14px;

    --scrollbar-track: #F4F0EB;
    --scrollbar-thumb: #C8C5DC;
    --scrollbar-hover: #6C63FF;
}

/* ── Dark Mode ───────────────────────── */
[data-theme="dark"] {
    --primary-color: #8B83FF;
    --primary-hover: #6C63FF;
    --secondary-color: #E8E3FF;
    --success-color: #4ADE80;
    --danger-color: #FB7185;
    --warning-color: #FBBF24;

    --bg-body: linear-gradient(145deg, #0D0B1A 0%, #151228 40%, #1A1635 100%);
    --bg-header: rgba(21,18,40,0.92);
    --bg-card: #1E1A36;
    --bg-input: #252142;
    --bg-badge: #2A2548;
    --bg-modal-overlay: rgba(0,0,0,0.65);

    --text-primary: #EDEAFF;
    --text-secondary: #9896B0;
    --text-section: #C8C5DC;
    --text-on-bg: #EDEAFF;

    --border-color: #2E2952;
    --border-header: #2E2952;
    --header-shadow: 0 2px 16px rgba(0,0,0,0.3);

    --white: #1E1A36;
    --shadow: 0 2px 10px rgba(0,0,0,0.25);
    --shadow-hover: 0 8px 24px rgba(139,131,255,0.18);

    --scrollbar-track: #151228;
    --scrollbar-thumb: #2E2952;
    --scrollbar-hover: #8B83FF;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-body);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.35s ease, color 0.25s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    padding-left: calc(20px + var(--safe-left, 0));
    padding-right: calc(20px + var(--safe-right, 0));
}

/* ── Theme Toggle ────────────────────── */
.theme-toggle {
    width: 52px;
    height: 28px;
    border-radius: 14px;
    border: none;
    cursor: pointer;
    position: relative;
    background: linear-gradient(135deg, #87CEEB 0%, #E0F0FF 100%);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
    transition: background 0.4s ease;
    padding: 0;
    flex-shrink: 0;
}

[data-theme="dark"] .theme-toggle {
    background: linear-gradient(135deg, #1A1635 0%, #2E2952 100%);
}

.theme-toggle-knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    transition: transform 0.35s cubic-bezier(0.68, -0.3, 0.32, 1.3);
    line-height: 1;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

[data-theme="dark"] .theme-toggle-knob {
    transform: translateX(24px);
    background: #2E2952;
    box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

.theme-toggle-knob .sun-icon,
.theme-toggle-knob .moon-icon {
    position: absolute;
    transition: opacity 0.25s ease, transform 0.35s ease;
}

.theme-toggle-knob .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle-knob .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle-knob .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle-knob .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* ── Header ──────────────────────────── */
.main-header {
    background: var(--bg-header);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--header-shadow);
    border-bottom: 1.5px solid var(--border-header);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-primary);
}

.logo i {
    font-size: 32px;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo h1 span {
    color: var(--primary-color);
}

/* ── Buttons ─────────────────────────── */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-family: 'Inter', sans-serif;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

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

.btn-secondary {
    background: var(--bg-badge);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-success {
    background: var(--success-color);
    color: #fff;
}

.btn-danger {
    background: var(--danger-color);
    color: #fff;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

/* ── Main Content ────────────────────── */
.main-content {
    padding: 40px 0;
}

.section-title {
    color: var(--text-section);
    font-family: 'Inter', sans-serif;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 30px;
    text-align: center;
    text-shadow: none;
}

/* ── Categories Grid ─────────────────── */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.category-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    position: relative;
    overflow: hidden;
    will-change: transform;
    border: 1px solid var(--border-color);
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary-color);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.category-icon {
    font-size: 36px;
    margin-bottom: 10px;
}

.category-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.category-card:hover .category-actions {
    opacity: 1;
}

.category-action-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    color: var(--text-secondary);
    transition: color 0.12s ease;
}

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

.category-action-btn.delete:hover {
    color: var(--danger-color);
}

.category-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.category-info {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-secondary);
    font-size: 14px;
}

.category-badge {
    background: var(--bg-badge);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ── Modal ────────────────────────────── */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-modal-overlay);
    z-index: 2000;
}

/* Modal de categoria deve ficar à frente do modal de itens (Editar Categoria) */
#categoryModal {
    z-index: 2100;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 30px 20px;
    overflow-y: auto;
    animation: modalFadeIn 0.12s ease-out;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    animation: modalSlideUp 0.15s ease-out;
    margin: auto 0;
    border: 1px solid var(--border-color);
}

.modal-large .modal-content {
    max-width: 1200px;
}

@keyframes modalSlideUp {
    from {
        transform: translateY(24px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 22px;
    color: var(--text-primary);
}

.modal-title-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.category-icon-display {
    font-size: 32px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.12s ease;
    padding: 5px 10px;
}

.modal-close:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-top: 25px;
}

/* ── Forms ────────────────────────────── */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    background: var(--bg-input);
    color: var(--text-primary);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.12);
}

.form-control-color {
    width: 100%;
    height: 45px;
    padding: 5px;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    background: var(--bg-input);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-help {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-secondary);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* ── Loading ──────────────────────────── */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.loading i {
    font-size: 48px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.loading p {
    font-size: 16px;
}

/* ── Empty State ──────────────────────── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

/* ── Items List ───────────────────────── */
.items-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.item-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: border-color 0.12s ease, box-shadow 0.12s ease;
    cursor: pointer;
}

.item-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.item-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.item-actions {
    display: flex;
    gap: 8px;
}

.item-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.badge-pending {
    background: #fff3cd;
    color: #856404;
}

.badge-in_progress {
    background: #cce5ff;
    color: #004085;
}

.badge-completed {
    background: #d4edda;
    color: #155724;
}

.badge-high {
    background: #f8d7da;
    color: #721c24;
}

.badge-medium {
    background: #fff3cd;
    color: #856404;
}

.badge-low {
    background: #d1ecf1;
    color: #0c5460;
}

[data-theme="dark"] .badge-pending   { background: #3D3520; color: #FBBF24; }
[data-theme="dark"] .badge-in_progress { background: #1A2940; color: #60A5FA; }
[data-theme="dark"] .badge-completed { background: #1A3028; color: #4ADE80; }
[data-theme="dark"] .badge-high      { background: #3D1A22; color: #FB7185; }
[data-theme="dark"] .badge-medium    { background: #3D3520; color: #FBBF24; }
[data-theme="dark"] .badge-low       { background: #1A2E32; color: #67E8F9; }

.item-content {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-top: 10px;
    white-space: pre-wrap;
}

/* ========================================
   MOBILE & TABLET — Heurísticas UX
   Touch targets ≥44px, safe areas, consistência
   ======================================== */

/* Breakpoints */
:root {
    --break-sm: 480px;
    --break-md: 768px;
    --break-lg: 1024px;
}

/* Base: tap highlight e font size (evita zoom iOS em inputs) */
html {
    -webkit-tap-highlight-color: transparent;
}

body {
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
    padding-bottom: var(--safe-bottom);
}

/* Botões: área de toque mínima (Heurística 4 – Consistência) */
.btn {
    min-height: var(--touch-min);
    min-width: var(--touch-min);
    padding: 12px 24px;
    align-items: center;
    justify-content: center;
}

.btn-sm {
    min-height: var(--touch-min);
    min-width: var(--touch-min);
    padding: 10px 16px;
    font-size: 14px;
}

/* Ações em cards sempre visíveis em touch (Heurística 6 – Reconhecimento) */
@media (hover: none) and (pointer: coarse) {
    .category-actions {
        opacity: 1;
    }
    .category-action-btn {
        min-width: var(--touch-min);
        min-height: var(--touch-min);
        padding: 10px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* Modais: full-viewport em mobile (Heurística 8 – Minimalista) */
@media (max-width: 768px) {
    .modal.active {
        padding: 0;
        align-items: flex-end;
    }
    .modal-content {
        max-height: 92vh;
        max-height: calc(92vh - var(--safe-bottom));
        border-radius: 16px 16px 0 0;
        margin: 0;
        padding-bottom: var(--safe-bottom);
    }
    .modal-large .modal-content {
        max-height: 95vh;
        max-height: calc(95vh - var(--safe-bottom));
    }
    .modal-header {
        padding: 20px 20px 16px;
        padding-left: calc(20px + var(--safe-left));
        padding-right: calc(20px + var(--safe-right));
    }
    .modal-header h3 {
        font-size: 18px;
    }
    .modal-close {
        min-width: var(--touch-min);
        min-height: var(--touch-min);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        margin: -8px -8px -8px 0;
    }
    .modal-body {
        padding: 20px;
        padding-left: calc(20px + var(--safe-left));
        padding-right: calc(20px + var(--safe-right));
    }
    .modal-footer {
        padding-bottom: calc(20px + var(--safe-bottom));
    }
}

/* Formulários: inputs legíveis sem zoom (16px) */
@media (max-width: 768px) {
    .form-control {
        font-size: 16px;
        min-height: var(--touch-min);
        padding: 14px 16px;
    }
    textarea.form-control {
        min-height: 140px;
    }
    .form-control-color {
        min-height: var(--touch-min);
        min-width: var(--touch-min);
    }
}

/* Header: compacto em mobile (Heurística 8) */
@media (max-width: 768px) {
    .main-header {
        padding: 14px 0;
        padding-top: calc(14px + var(--safe-top));
        padding-left: calc(20px + var(--safe-left));
        padding-right: calc(20px + var(--safe-right));
    }
    .header-content {
        flex-wrap: wrap;
        gap: 12px;
    }
    .header-content .container {
        padding: 0;
    }
    .logo {
        gap: 10px;
    }
    .logo i {
        font-size: 26px;
    }
    .logo h1 {
        font-size: 18px;
    }
    .header-content > div[style*="display:flex"] {
        display: flex !important;
        flex-wrap: wrap;
        gap: 8px;
        align-items: center;
    }
    #userMenu {
        width: 100%;
        border-left: none !important;
        padding-left: 0 !important;
        margin-top: 4px;
        padding-top: 8px;
        border-top: 1px solid var(--border-color);
    }
    #versionManagerBtn,
    #newCategoryBtn,
    .theme-toggle {
        min-height: var(--touch-min);
        min-width: var(--touch-min);
    }
    #newCategoryBtn {
        flex: 1;
        min-width: 0;
        justify-content: center;
    }
    #userDisplayName {
        max-width: 180px;
    }
}

/* Telefones muito pequenos: manter rótulos (reconhecimento) */
@media (max-width: 380px) {
    .header-content > div[style*="display:flex"] {
        justify-content: flex-start;
    }
    #newCategoryBtn,
    #versionManagerBtn {
        font-size: 13px;
        padding-left: 12px;
        padding-right: 12px;
    }
}

/* Grid categorias: 1 col mobile, 2 cols tablet */
@media (max-width: 767px) {
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 24px;
    }
    .category-card {
        padding: 20px;
    }
    .category-card::before {
        height: 4px;
    }
    .category-icon {
        font-size: 32px;
    }
    .category-title {
        font-size: 18px;
    }
    .main-content {
        padding: 24px 0;
        padding-bottom: calc(24px + var(--safe-bottom));
    }
    .section-title {
        font-size: 22px;
        margin-bottom: 20px;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* Tablet landscape e desktop */
@media (min-width: 1024px) {
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* Notificações (Heurística 1 – Visibilidade do estado) */
.app-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 14px 20px;
    color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    z-index: 10000;
    animation: slideInRight 0.3s ease;
    font-size: 14px;
    font-weight: 500;
    max-width: 360px;
}
.app-notification--success { background: var(--success-color); }
.app-notification--error   { background: var(--danger-color); }
.app-notification--info   { background: var(--info-color); }

@media (max-width: 768px) {
    .app-notification {
        left: 16px;
        right: 16px;
        left: calc(16px + var(--safe-left));
        right: calc(16px + var(--safe-right));
        bottom: calc(20px + var(--safe-bottom));
        top: auto;
        max-width: none;
    }
}

/* Empty state e loading: mais compactos em mobile */
@media (max-width: 768px) {
    .empty-state,
    .loading {
        padding: 40px 20px;
    }
    .empty-state i,
    .loading i {
        font-size: 40px;
    }
}

/* Item cards em listas: touch amigável */
@media (max-width: 768px) {
    .item-card {
        padding: 16px;
        min-height: auto;
    }
    .item-actions .category-action-btn,
    .item-actions .btn {
        min-width: var(--touch-min);
        min-height: var(--touch-min);
        padding: 10px;
    }
}

/* Form row em modal: uma coluna em mobile */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* ── Responsive (legado, mantido) ─────── */
@media (max-width: 768px) {
    .modal-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    .modal-actions .btn {
        min-height: var(--touch-min);
    }
    .modal-header {
        flex-wrap: wrap;
    }
    .modal-title-group {
        flex-wrap: wrap;
    }
}

/* ── Task Detail Modal ────────────────── */
#taskDetailModal .modal-content {
    max-width: 700px !important;
    max-height: 88vh !important;
    overflow-y: auto !important;
    overflow-x: hidden;
}

#taskDetailModal .modal-content,
#courseNotebooksModal .modal-content {
    margin-top: 30px;
}

.subtask-row {
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.subtask-row:hover {
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* ── Scrollbar ────────────────────────── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-hover);
}