/* ============================================================================
   AP ADICLASSES — GLOBAL DESIGN SYSTEM (base layer)
   app/static/css/main.css

   Single source of truth for color, type, radius, shadow, spacing — the
   same orange + blue AdiClasses brand palette as the parent site, since
   this is an AdiClasses sub-site. Every other stylesheet consumes these
   custom properties instead of hardcoding values.
============================================================================ */

:root {
    --blue: #0d6efd;
    --blue-dark: #0a4fb5;
    --blue-deep: #062f6e;
    --blue-light: #e8f1ff;
    --blue-mid: #cfe2ff;

    --orange: #ff6600;
    --orange-dark: #e05a00;
    --orange-light: #fff2e8;
    --orange-mid: #ffd9b8;

    --primary: var(--blue);
    --primary-dark: var(--blue-dark);
    --primary-light: var(--blue-light);
    --accent: var(--orange);
    --accent-dark: var(--orange-dark);

    --success: #16a34a;
    --success-light: #e8f8ee;
    --warning: #d97706;
    --warning-light: #fef3e2;
    --danger: #dc2626;
    --danger-light: #fdecec;
    --info: #0891b2;
    --info-light: #e6f7fa;

    --bg-app: #f4f7fb;
    --bg-surface: #ffffff;
    --bg-surface-alt: #f8fafc;
    --border-color: #e2e8f0;

    --text-primary: #1a2332;
    --text-secondary: #55637a;
    --text-muted: #94a3b8;

    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-pill: 50px;

    --shadow-sm: 0 2px 8px rgba(13, 45, 96, 0.06);
    --shadow: 0 6px 20px rgba(13, 45, 96, 0.10);
    --shadow-lg: 0 16px 40px rgba(13, 45, 96, 0.16);
    --shadow-orange: 0 6px 18px rgba(255, 102, 0, 0.22);
    --shadow-blue: 0 6px 18px rgba(13, 110, 253, 0.22);

    --font-body: Verdana, Geneva, "Segoe UI", Arial, sans-serif;
    --font-display: "Poppins", Verdana, sans-serif;

    --navbar-height: 68px;
    --toolbar-height: 54px;
    --sidebar-width: 268px;

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-bs-theme="dark"] {
    --bg-app: #0c1424;
    --bg-surface: #16213a;
    --bg-surface-alt: #101a2e;
    --border-color: #263450;
    --text-primary: #eef2f9;
    --text-secondary: #b7c2d6;
    --text-muted: #7c8aa8;
    --blue-light: #142a4d;
    --blue-mid: #1c3868;
    --orange-light: #2e2013;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg-app);
    color: var(--text-primary);
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: 15px;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); color: var(--text-primary); }
a { text-decoration: none; color: var(--blue); }
a:hover { color: var(--blue-dark); }
button { font-family: var(--font-body); cursor: pointer; }

code {
    background: rgba(0, 0, 0, 0.05);
    padding: 0.15em 0.45em;
    border-radius: var(--radius-sm);
    color: var(--blue-dark);
}

.skip-link {
    position: absolute; top: -40px; left: 0;
    background: var(--blue); color: #fff;
    padding: 0.5rem 1rem; z-index: 2000; border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { top: 0; }

.main-content { flex: 1; padding-top: calc(var(--navbar-height) + 1.25rem); padding-bottom: 2.5rem; min-height: 100vh; }
.auth-page-content { flex: 1; display: flex; min-height: 100vh; padding-top: 96px; }
@media (max-width: 768px) {
    .main-content { padding-top: calc(var(--navbar-height) + 0.75rem); }
    .auth-page-content { padding-top: 68px; }
}

/* ---- Authenticated navbar ---- */
.app-navbar {
    background: linear-gradient(120deg, var(--blue-deep) 0%, var(--blue) 100%);
    height: var(--navbar-height);
    box-shadow: var(--shadow);
    padding: 0 0.5rem;
}
.brand-logo-img { height: 38px; width: auto; display: block; }
.brand-text { color: #fff; font-weight: 700; font-size: 1.05rem; font-family: var(--font-display); }
.brand-text span, .brand-text-public span { color: var(--orange-mid); }
.app-navbar .nav-link {
    color: rgba(255, 255, 255, 0.88) !important; font-weight: 500;
    border-radius: var(--radius-sm); padding: 0.5rem 0.85rem !important; transition: var(--transition);
}
.app-navbar .nav-link:hover, .app-navbar .nav-link.active { color: #fff !important; background: rgba(255, 255, 255, 0.14); }
.app-navbar .nav-link.admin-link { color: var(--orange-mid) !important; }
.app-navbar .dropdown-menu { border: none; border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 0.5rem; margin-top: 0.5rem; }
.app-navbar .dropdown-item { border-radius: var(--radius-sm); padding: 0.55rem 0.85rem; font-size: 0.9rem; }
.app-navbar .dropdown-item:hover { background: var(--blue-light); color: var(--blue-dark); }
.app-navbar .dropdown-item.text-danger:hover { background: var(--danger-light); }

.navbar-avatar {
    width: 34px; height: 34px; border-radius: 50%;
    background: linear-gradient(135deg, var(--orange), var(--blue));
    color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; flex-shrink: 0;
}
.notification-badge { position: absolute; top: 2px; right: 2px; font-size: 0.6rem; padding: 0.2rem 0.4rem; border-radius: 10px; }
.notification-dropdown { width: 340px; max-height: 420px; overflow-y: auto; }
.notification-list { max-height: 300px; overflow-y: auto; }
.notification-item { white-space: normal; }
.notification-item.unread { background: var(--blue-light); }

/* ---- Footer + floats ---- */
.app-footer { background: linear-gradient(135deg, #0d1f3a, #133566); color: rgba(255, 255, 255, 0.85); padding: 2.25rem 1.5rem 1.25rem; margin-top: 2rem; }
.app-footer a { color: rgba(255, 255, 255, 0.75); }
.app-footer a:hover { color: #fff; }
.app-footer h4, .app-footer h6 { color: #fff; }
.app-footer .footer-brand-mark { color: var(--orange-mid); }
.app-footer .footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); margin-top: 1.5rem; padding-top: 1.25rem; font-size: 0.82rem; color: rgba(255, 255, 255, 0.55); }
.app-footer .social-row a { width: 34px; height: 34px; border-radius: 50%; background: rgba(255, 255, 255, 0.1); display: inline-flex; align-items: center; justify-content: center; margin-right: 0.5rem; transition: var(--transition); }
.app-footer .social-row a:hover { background: var(--orange); transform: translateY(-2px); }

.whatsapp-float {
    position: fixed; bottom: 1.75rem; right: 1.75rem; width: 58px; height: 58px; border-radius: 50%;
    background: #25d366; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4); z-index: 950; transition: var(--transition); color: #fff; font-size: 1.6rem;
}
.whatsapp-float:hover { transform: scale(1.08); color: #fff; }

.scroll-to-top {
    position: fixed; bottom: 1.75rem; left: 1.75rem; width: 46px; height: 46px; background: var(--blue);
    color: #fff; border: none; border-radius: 50%; font-size: 1.2rem; font-weight: 700;
    box-shadow: var(--shadow-blue); opacity: 0; visibility: hidden; transition: var(--transition); z-index: 900;
}
.scroll-to-top.visible { opacity: 1; visibility: visible; }
.scroll-to-top:hover { background: var(--blue-dark); transform: translateY(-3px); }

/* ---- Cards, headers ---- */
.card { background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.card-header { background: var(--bg-surface-alt); border-bottom: 1px solid var(--border-color); border-radius: var(--radius-lg) var(--radius-lg) 0 0 !important; font-family: var(--font-display); }
.page-header { margin-bottom: 1.5rem; }
.page-title { font-weight: 700; font-size: 1.6rem; display: flex; align-items: center; gap: 0.6rem; }
.page-title i { color: var(--orange); }
.section-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); margin-bottom: 0.75rem; }

/* ---- Buttons ---- */
.btn { border-radius: var(--radius-sm); font-weight: 600; font-family: var(--font-body); }
.btn-primary { background: var(--blue); border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); }
.btn-accent, .btn-orange { background: var(--orange); border-color: var(--orange); color: #fff; }
.btn-accent:hover, .btn-orange:hover { background: var(--orange-dark); border-color: var(--orange-dark); color: #fff; }
.btn-outline-primary { color: var(--blue); border-color: var(--blue); }
.btn-outline-primary:hover { background: var(--blue); border-color: var(--blue); }
.btn-outline-orange { color: var(--orange); border-color: var(--orange); }
.btn-outline-orange:hover, .btn-check:checked + .btn-outline-orange { background: var(--orange); border-color: var(--orange); color: #fff; }

/* ---- Badges, stat chips ---- */
.badge-soft-primary { background: var(--blue-light); color: var(--blue-dark); }
.badge-soft-success { background: var(--success-light); color: var(--success); }
.badge-soft-warning { background: var(--warning-light); color: var(--warning); }
.badge-soft-danger  { background: var(--danger-light); color: var(--danger); }
.badge-soft-info    { background: var(--info-light); color: var(--info); }
.badge-soft-orange  { background: var(--orange-light); color: var(--orange-dark); }
.badge-soft-secondary { background: rgba(100, 116, 139, 0.12); color: #475569; }

/* ---- Sidebar (used by catalog/practice pages) ---- */
.app-sidebar {
    width: var(--sidebar-width); background: var(--bg-surface); border-right: 1px solid var(--border-color);
    position: sticky; top: var(--navbar-height); height: calc(100vh - var(--navbar-height));
    overflow-y: auto; flex-shrink: 0; z-index: 100; transition: var(--transition);
}
.sidebar-section { padding: 1.1rem 1.25rem; border-bottom: 1px solid var(--border-color); }
.sidebar-section:last-child { border-bottom: none; }
.sidebar-title { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.75rem; }
@media (max-width: 992px) {
    .app-sidebar { position: fixed; left: calc(-1 * var(--sidebar-width)); top: 0; height: 100vh; z-index: 1040; box-shadow: 4px 0 24px rgba(0, 0, 0, 0.16); }
    .app-sidebar.active { left: 0; }
}

/* ---- Modals ---- */
.modal-content { border: none; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.modal-header { border-bottom: 1px solid var(--border-color); }
.modal-header .modal-title { font-family: var(--font-display); font-weight: 700; }
.modal-footer { border-top: 1px solid var(--border-color); }

/* ---- File drop area (shared across upload pages) ---- */
.file-drop-area {
    position: relative; border: 2px dashed var(--border-color); border-radius: var(--radius);
    padding: 2rem 1rem; text-align: center; cursor: pointer; transition: var(--transition); color: var(--text-secondary);
}
.file-drop-area:hover, .file-drop-area.drag-over { border-color: var(--blue); background: var(--blue-light); color: var(--blue-dark); }
.file-drop-area input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ---- Loading overlay + toasts + flash ---- */
.loading-overlay { position: fixed; inset: 0; z-index: 9999; background: var(--bg-app); display: flex; align-items: center; justify-content: center; transition: opacity 0.4s ease; }
.loading-overlay.fade-out { opacity: 0; pointer-events: none; }
.spinner-ring { width: 48px; height: 48px; border: 4px solid var(--border-color); border-top-color: var(--orange); border-radius: 50%; animation: spin 0.8s linear infinite; }
.loading-text { margin-top: 1rem; color: var(--text-secondary); text-align: center; }
@keyframes spin { to { transform: rotate(360deg); } }

.flash-messages-container .alert { position: relative; overflow: hidden; border-radius: var(--radius); border: none; box-shadow: var(--shadow-sm); }
.toast-progress-bar { position: absolute; bottom: 0; left: 0; height: 3px; background: rgba(0, 0, 0, 0.15); animation: toast-shrink 5s linear forwards; }
@keyframes toast-shrink { from { width: 100%; } to { width: 0%; } }
.toast-notification-custom { background: linear-gradient(135deg, #1e293b, #334155); color: #fff; border-radius: var(--radius); box-shadow: var(--shadow-lg); }

.flash-container { position: fixed; top: 100px; left: 50%; transform: translateX(-50%); width: 500px; z-index: 9999; }

/* ---- Utility ---- */
.text-soft { color: var(--text-secondary); }
.text-brand-orange { color: var(--orange); }
.text-brand-blue { color: var(--blue); }
.cursor-pointer { cursor: pointer; }
.empty-state i { opacity: 0.45; }
.empty-state { padding: 2.5rem 1rem; text-align: center; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.error-page-wrapper { display: flex; align-items: center; justify-content: center; min-height: 70vh; padding: 2rem; }
.error-page-content { max-width: 480px; text-align: center; }
.error-code { font-size: 5rem; font-weight: 800; color: var(--blue); font-family: var(--font-display); line-height: 1; margin-bottom: 0.5rem; }