/* ─── VARIABLES GLOBALES ──────────────────────────────────────────────────── */
:root {
    /* Couleurs marque */
    --violet: #5700c9;
    --violet-dark: #43009d;
    --jaune: #ffd900;
    --bleu: #00a4ff;
    --gris: #f5f5f7;
    --gris-moyen: #c8c8d0;
    --gris-sombre: #3f3f46;

    /* Divers */
    --border-radius: 14px;
    --transition: 0.7s ease;
    --transition-slow: 0.7s cubic-bezier(.22,.61,.36,1);
    /* Vitesse d'animation spécifique de la sidebar (peut être surchargée en JS) */
    --sidebar-speed: 0.9s cubic-bezier(.22,.61,.36,1);
    --header-h: 60px;
    --sidebar-w: 260px;
    --sidebar-w-mobile: 300px;
    --z-header: 10;
    --z-sidebar: 9;
}

/* ─── RESET & BASE ───────────────────────────────────────────────────────── */
*,

*::before,

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

html,

body {
    height: 100%;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--gris-sombre);
    background: #ffffff;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font: inherit;
}

ul {
    list-style: none;
}

/* ─── BARRE SUPÉRIEURE FIXE ──────────────────────────────────────────────── */
#topBar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    background: #ffffff;
    box-shadow: 0 1px 4px rgba(0 0 0 / 8%);
    z-index: var(--z-header);
}

#logoArea {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-left: 12px; /* léger décalage vers la droite */
}

#logoArea img {
    height: 35px;
    width: auto;
    max-height: 35px;
}

.badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 6px;
    background: var(--gris);
    color: var(--gris-sombre);
}

/* Badge VIP en jaune */
#planBadge[data-plan="VIP"] {
    background: #FFD700;
    color: #333;
}

#upgradeBtn.upgrade {
    padding: 6px 12px;
    border-radius: 8px;
    background: var(--violet);
    color: #fff;
    font-size: 0.875rem;
    transition: background var(--transition);
}

#upgradeBtn:hover {
    background: var(--violet-dark);
}

/* ─── BOUTON HOME ─────────────────────────────────────────── */
.home-btn {
    padding: 8px 12px;
    border-radius: 8px;
    background: var(--violet);
    color: #fff;
    font-size: 0.875rem;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
}

.home-btn:hover {
    background: var(--violet-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(87, 0, 201, 0.2);
}

.home-icon {
    font-size: 1.1rem;
}

/* ─── BOUTONS D'AUTHENTIFICATION ─────────────────────────────────────────── */
#loginBtn,
#signupBtn,
#logoutBtn {
    padding: 8px 16px;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    height: 36px;
}

#loginBtn {
    background: transparent;
    color: var(--violet);
    border: 2px solid var(--violet);
}

#loginBtn:hover {
    background: var(--violet);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(87, 0, 201, 0.2);
}

#signupBtn {
    background: var(--violet);
    color: #fff;
    border: 2px solid var(--violet);
}

#signupBtn:hover {
    background: var(--violet-dark);
    border-color: var(--violet-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(87, 0, 201, 0.3);
}

#logoutBtn {
    background: #f8f9fa;
    color: var(--gris-sombre);
    border: 2px solid #e9ecef;
}

#logoutBtn:hover {
    background: #e9ecef;
    color: var(--gris-sombre);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Conteneur pour les boutons d'authentification */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Responsive pour les boutons d'auth */
@media (max-width: 600px) {
    #loginBtn,
    #signupBtn {
        padding: 6px 12px;
        font-size: 0.8rem;
        min-width: 70px;
        height: 32px;
    }
    
    .auth-buttons {
        gap: 8px;
    }
}

/* ─── MENU UTILISATEUR AVEC AVATAR ───────────────────────────────────────── */
.user-menu {
    position: relative;
    display: inline-block;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    /* Couleur visible par défaut quand il n'y a pas d'image */
    background: linear-gradient(135deg, #3B82F6, #3B82F6) !important;
    background-color: #3B82F6 !important; /* fallback */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
    overflow: hidden;
    position: relative;
}

/* Quand une image est présente, neutraliser totalement le fond bleu */
.user-avatar.has-image {
    background: none !important;
    background-color: transparent !important;
}
.user-avatar.has-image .avatar-initial { display: none !important; }

/* Image réelle quand fournie par Google */
.user-avatar.has-image img.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.user-avatar:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(87, 0, 201, 0.3);
    border-color: var(--violet-dark);
}

.avatar-initial {
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition);
    z-index: 1000;
    border: 1px solid #e9ecef;
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-info {
    padding: 16px;
    border-bottom: 1px solid #f1f3f4;
}

.user-email {
    font-size: 0.875rem;
    color: var(--gris-sombre);
    font-weight: 500;
    word-break: break-all;
}

.menu-separator {
    height: 1px;
    background: #f1f3f4;
    margin: 4px 0;
}

.menu-item {
    width: 100%;
    padding: 12px 16px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.875rem;
    color: var(--gris-sombre);
    transition: background var(--transition);
    border-radius: 0;
}

.menu-item:first-of-type {
    border-radius: 12px 12px 0 0;
}

.menu-item:last-of-type {
    border-radius: 0 0 12px 12px;
}

.menu-item:hover {
    background: #f8f9fa;
    color: var(--violet);
}

.menu-icon {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

/* Responsive pour le menu utilisateur */
@media (max-width: 600px) {
    .user-avatar {
        width: 36px;
        height: 36px;
    }
    
    .avatar-initial {
        font-size: 1rem;
    }
    
    .dropdown-menu {
        min-width: 180px;
        right: -10px;
    }
}

#userBtn img {
    height: 28px;
    width: 28px;
}

/* ─── CONTENEUR GLOBAL ───────────────────────────────────────────────────── */
#appShell {
    display: flex;
    height: 100vh;
    padding-top: var(--header-h);

    /* espace pour header fixe */
    overflow: hidden;
}

/* ─── BARRE LATÉRALE (sidebar) ───────────────────────────────────────────── */
#sidebar {
    width: var(--sidebar-w);
    background: #ffffff;
    border-right: 1px solid var(--gris);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem 0.75rem;
    overflow-y: auto;
    overflow-x: hidden; /* pas de scrollbar horizontale dans la sidebar */
    overscroll-behavior: contain;
    z-index: 3000; /* au-dessus de #mainView pour que le bouton ne soit jamais masqué */
    transition: width var(--sidebar-speed), box-shadow var(--transition), background var(--transition);
    position: relative;
}

/* État par défaut sur desktop - toujours visible sauf si collapsed */
@media (min-width: 881px) {
  #sidebar:not(.collapsed) {
    width: var(--sidebar-w);
  }
    
    /* Éviter le flash pendant le chargement */
    #sidebar.initializing {
        transition: none !important;
    }
    /* Sur desktop: un seul bouton (toggle). Cacher le bouton fermer */
    .sidebar-close { display: none !important; }
    .sidebar-toggle { display: flex; }
    /* Orientation de la flèche (desktop): ouverte → flèche à gauche, fermée → flèche à droite */
    #sidebar:not(.collapsed) .toggle-svg { transform: rotate(180deg); }
    #sidebar.collapsed .toggle-svg { transform: rotate(0deg); }
}

/* Sidebar réduite */
#sidebar.collapsed {
    width: 0px;
    min-width: 0px;
    padding: 0;
    /* Laisser dépasser le bouton toggle pour rester cliquable */
    overflow: visible;
}

/* Desktop: état réduit à 40px */
@media (min-width: 881px) {
#sidebar.collapsed {
    width: 40px;
    padding: 6px 4px; /* léger padding pour le bouton et l'ombre */
  }
}

/* Bouton toggle de la sidebar - look moderne */
.sidebar-toggle {
    position: fixed; /* indépendant des scroll/overflow */
    top: 50%;
    left: calc(var(--sidebar-w) - 14px); /* aligné au bord droit de la sidebar ouverte */
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #7C3AED, #5B21B6);
    color: #fff;
    border: none;
    border-radius: 9999px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    z-index: 2000; /* au-dessus du contenu */
    transition: left var(--sidebar-speed), transform var(--sidebar-speed), box-shadow var(--transition), background var(--transition);
    box-shadow: 0 6px 18px rgba(91, 33, 182, 0.35);
}

.sidebar-toggle:hover {
    background: linear-gradient(135deg, #8B5CF6, #6D28D9);
    transform: translateY(-50%) scale(1.04);
}

.sidebar-toggle:focus-visible {
    outline: 3px solid rgba(99,102,241,.6);
    outline-offset: 2px;
}

.toggle-icon {
    transition: transform var(--transition-slow);
}

#sidebar.collapsed .toggle-icon {
    transform: rotate(180deg);
}

#sidebar.collapsed ~ .sidebar-toggle,
#sidebar.collapsed .sidebar-toggle {
    left: calc(40px - 14px); /* aligner au bord droit quand réduit à 40px */
}

/* SVG icon inside the toggle */
.toggle-svg {
    width: 18px;
    height: 18px;
    filter: brightness(0) invert(1); /* force white */
    transition: transform var(--transition-slow);
}

#sidebar.collapsed .toggle-svg {
    transform: rotate(180deg);
}

/* Tooltip léger pour le toggle */
/* Tooltip supprimé pour le bouton toggle */

.sidebar-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    background: var(--violet);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    z-index: 1001;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.sidebar-close:hover {
    background: var(--violet-dark);
    transform: scale(1.1);
}

.close-icon {
    font-weight: bold;
}

.sidebar-action {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--violet);
    padding: 6px 8px;
    border-radius: 8px;
    transition: all var(--transition);
    white-space: nowrap;
    overflow: hidden;
}

/* Masquer complètement le contenu quand la sidebar est réduite */
#sidebar.collapsed .sidebar-action,
#sidebar.collapsed .folder,
#sidebar.collapsed .file,
#sidebar.collapsed #fileTree,
#sidebar.collapsed .sidebar-close {
    opacity: 0;
    visibility: hidden;
}

.sidebar-action:hover {
    background: var(--gris);
}

/* Icônes génériques (placeholders – à remplacer par vraies images) */
.icon-plus-folder,
.folder-icon,
.file-icon,
.folder-toggle {
    display: inline-block;
    width: 18px;
    height: 18px;
    background: var(--gris-moyen);
    border-radius: 4px;
}

/* Remplacement des placeholders par de vraies icônes */
.icon-plus-folder {
    background: transparent;
    background-image: url('assets/img/8666644_folder_plus_icon.svg');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}

.folder-icon {
    background: transparent;
    background-image: url('assets/img/8666803_folder_documents_icon.svg');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}

/* Icônes spécifiques par type de fichier */
.file .file-icon {
    background: transparent;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}
.file[data-app="flashcards"] .file-icon {
    background-image: url('assets/img/flashcards.png');
}
.file[data-app="texte"] .file-icon {
    background-image: url('assets/img/Texte%20V2.png');
}
.file[data-app="image"] .file-icon {
    background-image: url('assets/img/image.png');
}

/* ─── FICHIER & DOSSIER TREEVIEW ─────────────────────────────────────────── */
#fileTree {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.9rem;
}

/* Dossiers */
.folder > .folder-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 4px 4px 4px 2px;
    border-radius: 6px;
    user-select: none;
    transition: background var(--transition);
}

.folder-header:hover {
    background: var(--gris);
}

.folder-children {
    padding-left: 1.2rem;
    margin-top: 2px;
    display: none;
}

.folder.open > .folder-children {
    display: block;
}

.folder-toggle {
    width: 10px;
    height: 10px;
    background: transparent;
    border: 4px solid transparent;
    border-left-color: var(--gris-sombre);
    transform: rotate(0deg);
    transition: transform var(--transition);
}

.folder.open > .folder-header .folder-toggle {
    transform: rotate(90deg);
}

/* Fichiers */
.file {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 4px;
    border-radius: 6px;
    user-select: none;
    transition: background var(--transition);
}

.file:hover {
    background: var(--gris);
}

/* Fichier actuellement ouvert (surlignage façon chat) */
.file.active {
    background: var(--gris);
    font-weight: 600;
    position: relative;
}
.file.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 3px;
    border-radius: 3px;
    background: var(--violet);
}

.file-name[contenteditable="true"] {
    outline: 1px dashed var(--violet);
}

/* Menus invisibles pour maintenant (icône placeholder) */
.file-menu,
.folder-menu {
    margin-left: auto;
    width: 20px;
    height: 20px;
    background-color: transparent;
    background-image: url('assets/img/3844444_dot_menu_more_option_icon.svg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border-radius: 3px;
    opacity: 0;
    transition: opacity var(--transition);
}

.file:hover .file-menu,

.folder-header:hover .folder-menu {
    opacity: 1;
}

/* Menu contextuel vertical (style ChatGPT) */
.ctxMenu {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,.12);
    min-width: 180px;
}
.ctxMenu .ctx-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: none;
    background: transparent;
    color: #111827;
    text-align: left;
    border-radius: 6px;
    cursor: pointer;
}
.ctxMenu .ctx-item:hover { background: #f3f4f6; }
.ctxMenu .ctx-item.danger { color: #c62828; }

/* ─── JAUGE DE QUOTA ─────────────────────────────────────────────────────── */
#quotaBox {
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    transition: all var(--transition);
}

/* Masquer la quota quand la sidebar est réduite */
#sidebar.collapsed #quotaBox {
    opacity: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
}

#quotaBarWrap {
    flex: 1 1 auto;
    height: 6px;
    background: var(--gris);
    border-radius: 4px;
    overflow: hidden;
}

#quotaBar {
    height: 100%;
    width: 0%;
    background: var(--violet);
    transition: width var(--transition);
}

#quotaLabel {
    min-width: 45px;
    text-align: right;
}

/* ─── VUE PRINCIPALE ─────────────────────────────────────────────────────── */
#mainView {
    position: relative;
    flex: 1 1 auto;
    overflow: hidden;
    z-index: 1; /* derrière la sidebar */

    /* pas de scroll intérieur : on délègue aux apps */
    background: var(--gris);
    display: flex;
    flex-direction: column;
}

/* ─ Accueil : carte d’app ─ */
#appSelector {
    padding: 2rem clamp(1rem, 4vw, 2.5rem);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    place-content: start center;
    overflow-y: auto;
}

.app-card {
    background: #ffffff;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0 0 0 / 6%);
    padding: 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform var(--transition), box-shadow var(--transition);
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0 0 0 / 10%);
}

.app-illustration {
    width: 100%;
    height: 200px; /* blocs plus hauts */
    border-radius: calc(var(--border-radius) - 4px);
    background-size: contain; /* image un peu plus petite, non coupée */
    background-position: center;
    background-repeat: no-repeat;
}

.app-illustration.flashcards {
    background-image: url('assets/img/flashcards.png');
}

.app-illustration.texte {
    background-image: url('assets/img/Texte%20V2.png');
}

.app-illustration.image {
    background-image: url('assets/img/image.png');
}

/* Responsive: un peu moins haut sur petits écrans */
@media (max-width: 700px) {
  .app-illustration { height: 160px; }
}

.app-card h2 {
    font-size: 1.3rem;
    color: var(--gris-sombre);
}

.app-card p {
    font-size: 0.9rem;
    line-height: 1.35;
}

.createBtn {
    align-self: flex-start;
    margin-top: auto;
    padding: 6px 14px;
    border-radius: 8px;
    background: var(--violet);
    color: #fff;
    font-weight: 600;
    transition: background var(--transition);
}

.createBtn:hover {
    background: var(--violet-dark);
}

/* ─ Iframe App ─ */
#appFrame {
    flex: 1 1 auto;
    border: none;
    width: 100%;
    height: 100%;
}

/* Cacher l’iframe tant qu’aucune app n’est chargée */
#appFrame[hidden] {
    display: none;
}

/* ─── ÉTATS DE DÉPLACEMENT (drag & drop) ─────────────────────────────────── */
.dragging {
    opacity: 0.4;
}

.drag-over {
    background: var(--jaune);
}

/* ─── RESPONSIVE < 880 px : sidebar escamotable ──────────────────────────── */
@media (max-width: 880px) {
    /* Sidebar mobile en overlay (au-dessus du contenu) */
    #sidebar {
        position: fixed;
        top: var(--header-h);
        left: calc(-84vw + 22px); /* masquée mais laisse un petit débord visible */
        width: 84vw;
        height: calc(100vh - var(--header-h));
        transition: left var(--sidebar-speed);
        box-shadow: 2px 0 12px rgba(0 0 0 / 20%);
        z-index: 4000;
        padding: 1rem 0.75rem;
        background: #ffffff;
    }
    #sidebar.open { left: 0; }

    /* Décaler légèrement le contenu pour laisser passer le bouton */
    #mainView { padding-left: 44px; }

    /* Overlay au-dessus des apps quand panneau ouvert */
    #appShell::before {
        content: "";
        position: fixed;
        inset: 0;
        background: rgba(0 0 0 / 30%);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition);
        z-index: 3500;
    }
    #appShell.open::before { opacity: 1; pointer-events: auto; }

    /* Bouton toggle proche du bord à gauche, et suit le bord du panneau quand ouvert */
    .sidebar-toggle {
        position: fixed;
        left: 8px;
        right: auto;
        top: 50%;
        transform: translateY(-50%);
        z-index: 4500;
    }
    #sidebar.open .sidebar-toggle { left: calc(84vw - 14px); }

    /* Cacher le bouton close en mobile (inutile) */
    .sidebar-close { display: none !important; }

    /* Orientation de la flèche selon l'état (mobile) */
    #sidebar.open .toggle-svg { transform: rotate(180deg); }
}

/* ─── RESPONSIVE < 600 px : cartes pleines largeur ───────────────────────── */
@media (max-width: 600px) {
    #appSelector {
        grid-template-columns: 1fr;
    }
}

/* ─── MODAL D'AUTHENTIFICATION ───────────────────────────────────────────── */
#authOverlay      {position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#0008;z-index:5000}
#authOverlay.hide {display:none}
#authModal        {background:#fff;border-radius:12px;padding:24px;min-width:320px;max-width:380px;box-shadow:0 8px 24px rgba(0,0,0,.2);position:relative}
#authModal .close {position:absolute;top:8px;right:8px;border:none;background:transparent;font-size:20px;cursor:pointer}
#tabs             {display:flex;margin-bottom:16px}
.tab              {border:none;background:none;font-weight:600;padding:8px 16px;cursor:pointer}
.tab.active       {border-bottom:2px solid #5400A5}
.panel            {display:none;margin-top:16px}
.panel.active     {display:block}
.gBtn             {width:100%;background:#fff;border:1px solid #ddd;padding:10px;border-radius:6px;margin-bottom:12px;cursor:pointer}
form input        {width:100%;margin:6px 0;padding:10px;border:1px solid #ccc;border-radius:6px}
form button       {width:100%;padding:10px;border:none;border-radius:6px;background:#5400A5;color:#fff;font-weight:600;cursor:pointer}

/* ─── MODAL D'UPGRADE VIP ───────────────────────────────────────────── */
#upgradeOverlay   {position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#0008;z-index:5000}
#upgradeOverlay.hide {display:none}
#upgradeModal     {background:#fff;border-radius:12px;padding:32px;min-width:600px;max-width:800px;box-shadow:0 8px 24px rgba(0,0,0,.2);position:relative}
#upgradeModal .close {position:absolute;top:12px;right:12px;border:none;background:transparent;font-size:24px;cursor:pointer}
.upgrade-content h2 {text-align:center;margin-bottom:24px;color:#5400A5;font-size:28px}
.plan-comparison   {display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:32px}
.plan             {border:2px solid #eee;border-radius:8px;padding:20px;text-align:center}
.plan.vip         {border-color:#5400A5;background:linear-gradient(135deg,#5400A5,#7B2CBF)}
.plan.vip h3      {color:#fff;margin-bottom:16px}
.plan.vip ul      {color:#fff;text-align:left}
.plan.free h3     {color:#333;margin-bottom:16px}
.plan.free ul     {color:#666;text-align:left}
.plan ul          {list-style:none;padding:0;margin:0}
.plan li          {margin:8px 0;font-size:14px}
.upgrade-actions  {text-align:center}
.upgrade-btn      {background:linear-gradient(135deg,#5400A5,#7B2CBF);color:#fff;border:none;padding:16px 32px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;margin-right:12px}
.cancel-btn       {background:#f5f5f5;color:#666;border:1px solid #ddd;padding:16px 32px;border-radius:8px;font-size:16px;cursor:pointer}
.upgrade-btn:hover {transform:translateY(-2px);box-shadow:0 4px 12px rgba(84,0,165,.3)}

/* Edge soft shadow when expanded so button edge is readable */
#sidebar::after {
    content: "";
    position: absolute;
    top: 0;
    right: -16px;
    width: 16px;
    height: 100%;
    pointer-events: none;
    background: linear-gradient(90deg, rgba(0,0,0,0.08), rgba(0,0,0,0.0));
    opacity: .35;
}

#sidebar.collapsed::after { display: none; }