/* ============================================================
   Nubexis Admin — Design System v3
   Premium corporate — Professional-grade UI
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.1), 0 4px 8px rgba(0,0,0,.06);
  --shadow-xl: 0 12px 48px rgba(0,0,0,.12), 0 6px 16px rgba(0,0,0,.08);
  --shadow-2xl: 0 24px 64px rgba(0,0,0,.16);
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --transition-fast: .15s ease;
  --transition-bounce: .4s cubic-bezier(.34,1.56,.64,1);
  --transition-theme: .5s cubic-bezier(.4,0,.2,1);

  /* Light palette — refined */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-subtle: #eef2ff;
  --accent-light: rgba(99,102,241,.1);
  --success: #10b981;
  --success-light: rgba(16,185,129,.1);
  --warning: #f97316;
  --warning-light: rgba(249,115,22,.1);
  --danger: #ef4444;
  --danger-light: rgba(239,68,68,.1);
  --info: #0ea5e9;
  --info-light: rgba(14,165,233,.1);
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #6366f1, #a78bfa);
  --gradient-warm: linear-gradient(135deg, #f97316, #f59e0b);
  --gradient-cool: linear-gradient(135deg, #0ea5e9, #06b6d4);
  --gradient-card: linear-gradient(135deg, rgba(99,102,241,.05), rgba(139,92,246,.05));
  --glass: rgba(255,255,255,.72);
  --glass-border: rgba(255,255,255,.35);
  --glass-strong: rgba(255,255,255,.88);
  --scrollbar-track: #f1f5f9;
  --scrollbar-thumb: #cbd5e1;
  --sidebar-width: 260px;
  --topbar-height: 60px;
}

[data-theme="dark"] {
  --bg-primary: #0b0d17;
  --bg-secondary: #131628;
  --bg-tertiary: #1c1f37;
  --bg-card: #181b30;
  --bg-sidebar: #080a14;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e2240;
  --border-light: #181b30;
  --accent-subtle: rgba(99,102,241,.08);
  --accent-light: rgba(99,102,241,.15);
  --success-light: rgba(16,185,129,.12);
  --warning-light: rgba(249,115,22,.12);
  --danger-light: rgba(239,68,68,.12);
  --info-light: rgba(14,165,233,.12);
  --gradient-card: linear-gradient(135deg, rgba(99,102,241,.08), rgba(139,92,246,.08));
  --glass: rgba(19,22,40,.82);
  --glass-border: rgba(255,255,255,.07);
  --glass-strong: rgba(19,22,40,.92);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow: 0 4px 16px rgba(0,0,0,.35);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.45);
  --shadow-xl: 0 12px 48px rgba(0,0,0,.5);
  --shadow-2xl: 0 24px 64px rgba(0,0,0,.55);
  --scrollbar-track: #131628;
  --scrollbar-thumb: #2d3154;
}

/* ── Reset ─────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;transition:background-color var(--transition-theme), color var(--transition-theme)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button{cursor:pointer;font-family:var(--font);border:none;background:none}
input,select,textarea{font-family:var(--font);font-size:.9rem}
ul,ol{list-style:none}
::selection{background:var(--accent);color:#fff}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--scrollbar-track)}
::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}

/* ── Smooth theme transition for all elements ──────────────── */
*,*::before,*::after{transition:background-color var(--transition-theme), border-color var(--transition-theme), box-shadow var(--transition-theme), color var(--transition-fast)}

/* ── Layout ────────────────────────────────────────────────── */
.app-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);color:#e2e8f0;display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100;transition:transform var(--transition), background-color var(--transition-theme)}
.sidebar__brand{padding:1.5rem;display:flex;align-items:center;gap:.75rem;border-bottom:1px solid rgba(255,255,255,.06)}
.sidebar__logo{width:36px;height:36px;background:var(--gradient);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;color:#fff;transition:transform var(--transition-fast), box-shadow var(--transition-fast);flex-shrink:0;box-shadow:0 4px 12px rgba(99,102,241,.3)}
.sidebar__brand:hover .sidebar__logo{transform:scale(1.05) rotate(-2deg);box-shadow:0 6px 20px rgba(99,102,241,.4)}
.sidebar__title{font-size:1.05rem;font-weight:700;letter-spacing:-.02em;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sidebar__subtitle{font-size:.68rem;color:rgba(255,255,255,.35);text-transform:uppercase;letter-spacing:.08em;margin-top:1px}
.sidebar__nav{flex:1;padding:.75rem 0;overflow-y:auto}
.sidebar__nav::-webkit-scrollbar{width:3px}
.sidebar__link{display:flex;align-items:center;gap:.75rem;padding:.65rem 1.5rem;color:rgba(255,255,255,.55);font-size:.87rem;font-weight:500;transition:all var(--transition-fast);border-left:3px solid transparent;position:relative}
.sidebar__link:hover{color:#fff;background:rgba(255,255,255,.05)}
.sidebar__link--active,.sidebar__link--active:hover{color:#fff;background:rgba(99,102,241,.12);border-left-color:var(--accent)}
.sidebar__link--active::before{content:'';position:absolute;left:-3px;top:50%;transform:translateY(-50%);width:3px;height:60%;background:var(--accent);border-radius:0 3px 3px 0;box-shadow:0 0 12px rgba(99,102,241,.5)}
.sidebar__link svg{width:18px;height:18px;flex-shrink:0;transition:transform var(--transition-fast)}
.sidebar__link:hover svg{transform:scale(1.1)}
.sidebar__link--active svg{color:var(--accent)}
.sidebar__link .link-badge{position:absolute;right:1.25rem;background:var(--accent);color:#fff;font-size:.62rem;font-weight:600;padding:.12rem .45rem;border-radius:10px;line-height:1.4}
.sidebar__section{padding:.5rem 1.5rem .3rem;font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;color:rgba(255,255,255,.25);margin-top:.25rem}
.sidebar__user{padding:1rem 1.5rem;border-top:1px solid rgba(255,255,255,.06);display:flex;align-items:center;gap:.75rem}
.sidebar__avatar{width:36px;height:36px;border-radius:50%;background:var(--gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.8rem;flex-shrink:0;box-shadow:0 2px 8px rgba(99,102,241,.3)}
.sidebar__user-info{flex:1;min-width:0}
.sidebar__user-name{font-size:.84rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:rgba(255,255,255,.85)}
.sidebar__user-role{font-size:.68rem;color:rgba(255,255,255,.35)}

.main-content{margin-left:var(--sidebar-width);flex:1;display:flex;flex-direction:column;min-height:100vh;min-width:0}
.topbar{background:var(--glass);border-bottom:1px solid var(--border);padding:0 2rem;height:var(--topbar-height);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:50;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.topbar__left{display:flex;align-items:center;gap:1rem;min-width:0}
.topbar__title{font-size:1.05rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar__right{display:flex;align-items:center;gap:.75rem;flex-shrink:0}
.page-content{flex:1;padding:2rem;min-width:0}

/* No Sidebar overrides */
body.no-sidebar .sidebar{display:none}
body.no-sidebar .main-content{margin-left:0}
body.no-sidebar .menu-toggle{display:none !important}

/* ── Menu toggle (mobile) ──────────────────────────────────── */
.menu-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-primary);background:var(--bg-tertiary);transition:all var(--transition-fast)}
.menu-toggle:hover{background:var(--border);color:var(--accent)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:99;animation:fadeIn .2s ease}

/* ── Buttons ───────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.6rem 1.25rem;border-radius:var(--radius-sm);font-size:.85rem;font-weight:500;transition:all var(--transition-fast);border:1px solid transparent;white-space:nowrap;cursor:pointer;user-select:none;position:relative;overflow:hidden}
.btn svg{width:16px;height:16px;flex-shrink:0}
.btn--primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn--primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 16px rgba(99,102,241,.35)}
.btn--primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(99,102,241,.25)}
.btn--secondary{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border)}
.btn--secondary:hover{background:var(--border);transform:translateY(-1px)}
.btn--secondary:active{transform:translateY(0)}
.btn--danger{background:var(--danger);color:#fff}
.btn--danger:hover{background:#dc2626;transform:translateY(-1px);box-shadow:0 4px 16px rgba(239,68,68,.35)}
.btn--success{background:var(--success);color:#fff}
.btn--success:hover{background:#059669;transform:translateY(-1px);box-shadow:0 4px 16px rgba(16,185,129,.35)}
.btn--ghost{color:var(--text-secondary);padding:.5rem}
.btn--ghost:hover{color:var(--text-primary);background:var(--bg-tertiary)}
.btn--outline{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn--outline:hover{background:var(--accent-light);transform:translateY(-1px)}
.btn--sm{padding:.4rem .8rem;font-size:.8rem}
.btn--icon{width:36px;height:36px;padding:0}
.btn--lg{padding:.75rem 1.5rem;font-size:.95rem}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none !important;box-shadow:none !important}

/* ── Ripple Effect ─────────────────────────────────────────── */
.ripple{position:absolute;border-radius:50%;background:rgba(255,255,255,.35);transform:scale(0);animation:rippleAnim .6s ease-out;pointer-events:none}
@keyframes rippleAnim{to{transform:scale(4);opacity:0}}

/* ── Badges ────────────────────────────────────────────────── */
.badge{display:inline-flex;align-items:center;padding:.2rem .65rem;border-radius:20px;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;line-height:1.5;gap:.3rem}
.badge svg{width:12px;height:12px}
.badge--admin{background:var(--accent-light);color:var(--accent)}
.badge--estandar{background:var(--info-light);color:var(--info)}
.badge--vista{background:var(--warning-light);color:var(--warning)}
.badge--success{background:var(--success-light);color:var(--success)}
.badge--danger{background:var(--danger-light);color:var(--danger)}

/* ── Cards (KPI / Stats) ──────────────────────────────────── */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.25rem;margin-bottom:2rem}
.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;display:flex;align-items:center;gap:1rem;transition:all var(--transition);cursor:default;position:relative;overflow:hidden}
.stat-card::after{content:'';position:absolute;top:0;left:0;right:0;height:3px;opacity:0;transition:opacity var(--transition)}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:transparent}
.stat-card:hover::after{opacity:1}
.stat-card:nth-child(1)::after{background:var(--gradient-accent)}
.stat-card:nth-child(2)::after{background:var(--gradient)}
.stat-card:nth-child(3)::after{background:var(--gradient-warm)}
.stat-card:nth-child(4)::after{background:var(--gradient-cool)}
.stat-card__icon{width:48px;height:48px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0;position:relative}
.stat-card__icon svg{width:24px;height:24px;color:#fff}
.stat-card__icon--blue{background:var(--gradient-accent)}
.stat-card__icon--green{background:linear-gradient(135deg,#10b981,#059669)}
.stat-card__icon--amber{background:var(--gradient-warm)}
.stat-card__icon--red{background:linear-gradient(135deg,#ef4444,#dc2626)}
.stat-card__value{font-size:1.6rem;font-weight:800;line-height:1.2;letter-spacing:-.03em}
.stat-card__label{font-size:.78rem;color:var(--text-muted);font-weight:500}

/* ── Sparkline mini charts (inline SVG) ───────────────────── */
.stat-card__sparkline{position:absolute;bottom:0;right:0;width:80px;height:40px;opacity:.08;pointer-events:none}
.stat-card__sparkline svg{width:100%;height:100%}

/* ── Site Cards (Carousel) ─────────────────────────────────── */
.carousel-section{margin-bottom:2rem}
.carousel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.25rem}
.carousel-header h2{font-size:1.2rem;font-weight:700}
.carousel-header p{font-size:.85rem;color:var(--text-muted)}
.carousel-wrapper{position:relative;padding:0 28px}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:50%;background:var(--glass-strong);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-primary);box-shadow:var(--shadow-lg);z-index:20;transition:all var(--transition-fast);opacity:0;pointer-events:none;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.carousel-wrapper:hover .carousel-btn{opacity:1;pointer-events:all}
.carousel-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent);transform:translateY(-50%) scale(1.08);box-shadow:0 4px 16px rgba(99,102,241,.35)}
.carousel-btn:active{transform:translateY(-50%) scale(.92)}
.carousel-btn svg{width:20px;height:20px}
.carousel-btn--prev{left:-6px}
.carousel-btn--next{right:-6px}
.carousel-track{display:flex;gap:1.25rem;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:.5rem .25rem 1rem;-webkit-overflow-scrolling:touch}
.carousel-track::-webkit-scrollbar{height:4px}
.site-card{min-width:290px;max-width:320px;background:var(--glass-strong);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;scroll-snap-align:start;transition:all var(--transition);flex-shrink:0;display:flex;flex-direction:column;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.site-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:transparent;background:var(--bg-card)}
.site-card::before{content:'';position:absolute;inset:0;border-radius:var(--radius-lg);padding:1px;background:linear-gradient(135deg, transparent, transparent);-webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;transition:all var(--transition);pointer-events:none}
.site-card:hover::before{background:linear-gradient(135deg, var(--accent), transparent)}
.site-card__image{height:160px;background:var(--gradient-card);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.site-card__image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}
.site-card:hover .site-card__image img{transform:scale(1.08)}
.site-card__image-placeholder{font-size:2.5rem;color:var(--accent);opacity:.4;transition:opacity var(--transition-fast)}
.site-card:hover .site-card__image-placeholder{opacity:.7}
.site-card__badge{position:absolute;top:.75rem;right:.75rem}
.site-card__body{padding:1.25rem;flex:1;display:flex;flex-direction:column}
.site-card__name{font-size:1rem;font-weight:600;margin-bottom:.35rem}
.site-card__desc{font-size:.82rem;color:var(--text-secondary);line-height:1.5;flex:1;margin-bottom:1rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.site-card__action{margin-top:auto}
.site-card__btn{width:100%;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.65rem;border-radius:var(--radius-sm);font-size:.85rem;font-weight:500;background:var(--accent-light);color:var(--accent);transition:all var(--transition-fast);position:relative;overflow:hidden}
.site-card__btn:hover{background:var(--accent);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,.3)}
.site-card__btn:active{transform:translateY(0)}
.site-card__btn svg{width:16px;height:16px}

/* ── Scroll progress bar for carousel ─────────────────────── */
.carousel-progress{height:3px;background:var(--border);border-radius:3px;overflow:hidden;margin-top:-.5rem;margin-bottom:1rem;max-width:300px;margin-left:auto;margin-right:auto}
.carousel-progress__bar{height:100%;background:var(--gradient);border-radius:3px;transition:width .2s ease;width:0}

/* ── Search ────────────────────────────────────────────────── */
.search-box{position:relative;max-width:320px}
.search-box__input{width:100%;padding:.6rem 1rem .6rem 2.5rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-tertiary);color:var(--text-primary);font-size:.85rem;transition:all var(--transition-fast)}
.search-box__input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);background:var(--bg-secondary)}
.search-box__input::placeholder{color:var(--text-muted)}
.search-box__icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--text-muted);width:16px;height:16px;pointer-events:none}

/* ── Tables ────────────────────────────────────────────────── */
.table-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow var(--transition), border-color var(--transition)}
.table-container:hover{box-shadow:var(--shadow);border-color:var(--accent)}
.table-toolbar{padding:1rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;border-bottom:1px solid var(--border);background:var(--bg-secondary)}
.table-filters{display:flex;gap:.75rem;flex-wrap:wrap}
.table-scroll{overflow-x:auto}
.data-table{width:100%;border-collapse:collapse;font-size:.85rem}
.data-table thead{position:sticky;top:0;z-index:5}
.data-table th{padding:.75rem 1rem;text-align:left;font-weight:600;font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);background:var(--bg-tertiary);border-bottom:1px solid var(--border);white-space:nowrap}
.data-table td{padding:.75rem 1rem;border-bottom:1px solid var(--border-light);vertical-align:middle}
.data-table tbody tr{transition:background var(--transition-fast)}
.data-table tbody tr:nth-child(even) td{background:rgba(0,0,0,.015)}
[data-theme="dark"] .data-table tbody tr:nth-child(even) td{background:rgba(255,255,255,.015)}
.data-table tbody tr:hover td{background:var(--accent-subtle)}
.data-table tbody tr:active td{background:var(--accent-light)}
.data-table tr:last-child td{border-bottom:none}
.table-actions{display:flex;gap:.25rem}

/* ── Forms ─────────────────────────────────────────────────── */
.form-group{margin-bottom:1.25rem}
.form-label{display:block;font-size:.8rem;font-weight:500;color:var(--text-secondary);margin-bottom:.4rem}
.form-input,.form-select{width:100%;padding:.65rem .9rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-size:.88rem;transition:all var(--transition-fast)}
.form-input:focus,.form-select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);background:var(--bg-secondary)}
.form-input.has-error{border-color:var(--danger);box-shadow:0 0 0 3px var(--danger-light)}
.form-input::placeholder{color:var(--text-muted)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-check{display:flex;align-items:center;gap:.5rem;font-size:.85rem;cursor:pointer;padding:.25rem 0}
.form-check input[type="checkbox"]{width:16px;height:16px;accent-color:var(--accent);cursor:pointer}
.input-group{position:relative}
.input-group__toggle{position:absolute;right:.75rem;top:50%;transform:translateY(-50%);color:var(--text-muted);cursor:pointer;background:none;border:none;padding:0;transition:color var(--transition-fast)}
.input-group__toggle:hover{color:var(--accent)}
.input-group__toggle svg{width:18px;height:18px}

/* ── Toggle Switch ─────────────────────────────────────────── */
.toggle{position:relative;display:inline-flex;align-items:center;gap:.6rem;cursor:pointer;user-select:none}
.toggle__input{position:absolute;opacity:0;width:0;height:0}
.toggle__slider{position:relative;width:40px;height:22px;background:var(--border);border-radius:11px;transition:all var(--transition-fast);flex-shrink:0}
.toggle__slider::after{content:'';position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.15);transition:all var(--transition-fast)}
.toggle__input:checked + .toggle__slider{background:var(--accent)}
.toggle__input:checked + .toggle__slider::after{transform:translateX(18px)}
.toggle__label{font-size:.85rem;color:var(--text-secondary)}
.toggle:hover .toggle__slider{box-shadow:0 0 0 3px var(--accent-light)}

/* ── Modal ─────────────────────────────────────────────────── */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);z-index:200;display:flex;align-items:center;justify-content:center;padding:1rem;opacity:0;pointer-events:none;transition:opacity var(--transition)}
.modal-backdrop.active{opacity:1;pointer-events:all}
.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);width:100%;max-width:540px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-2xl);transform:scale(.9) translateY(30px);transition:transform var(--transition-bounce)}
.modal-backdrop.active .modal{transform:scale(1) translateY(0)}
.modal__header{padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:var(--bg-card);z-index:10;border-radius:var(--radius-xl) var(--radius-xl) 0 0}
.modal__title{font-size:1.05rem;font-weight:600}
.modal__close{width:32px;height:32px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:all var(--transition-fast)}
.modal__close:hover{background:var(--danger-light);color:var(--danger);transform:rotate(90deg)}
.modal__close svg{width:18px;height:18px}
.modal__body{padding:1.5rem}
.modal__footer{padding:1rem 1.5rem;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:.75rem;position:sticky;bottom:0;background:var(--bg-card);border-radius:0 0 var(--radius-xl) var(--radius-xl)}

/* ── Login ─────────────────────────────────────────────────── */
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);padding:1.5rem;position:relative;overflow:hidden}
.login-page__bg{position:absolute;inset:0;overflow:hidden}
.login-page__bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(99,102,241,.04) 1px, transparent 1px),linear-gradient(90deg, rgba(99,102,241,.04) 1px, transparent 1px);background-size:48px 48px;animation:gridMove 20s linear infinite}
@keyframes gridMove{0%{transform:translate(0,0)}100%{transform:translate(48px,48px)}}
.login-page__bg-glow{position:absolute;width:700px;height:700px;border-radius:50%;background:var(--gradient);opacity:.08;top:-250px;right:-200px;animation:floatBlob 10s ease-in-out infinite}
.login-page__bg-glow2{position:absolute;width:500px;height:500px;border-radius:50%;background:linear-gradient(135deg,#8b5cf6,#0ea5e9);opacity:.06;bottom:-150px;left:-150px;animation:floatBlob 12s ease-in-out infinite reverse}
@keyframes floatBlob{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,-30px) scale(1.05)}}
.login-card{background:var(--glass-strong);border:1px solid var(--glass-border);border-radius:var(--radius-2xl);padding:2.75rem;width:100%;max-width:420px;position:relative;z-index:1;box-shadow:var(--shadow-2xl), 0 0 0 1px rgba(255,255,255,.1) inset;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);animation:cardFadeIn .6s cubic-bezier(.16,1,.3,1)}
@keyframes cardFadeIn{from{opacity:0;transform:translateY(30px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.login-card__brand{text-align:center;margin-bottom:2rem}
.login-card__logo{width:64px;height:64px;background:var(--gradient);border-radius:var(--radius-lg);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:1.5rem;margin-bottom:1rem;transition:transform var(--transition-fast);box-shadow:0 8px 24px rgba(99,102,241,.3)}
.login-card__brand:hover .login-card__logo{transform:scale(1.08) rotate(-4deg)}
.login-card__title{font-size:1.5rem;font-weight:800;letter-spacing:-.03em}
.login-card__subtitle{color:var(--text-muted);font-size:.85rem;margin-top:.35rem}

/* ── Login form icons inside inputs ────────────────────────── */
.input-icon{position:relative}
.input-icon__icon{position:absolute;left:.85rem;top:50%;transform:translateY(-50%);color:var(--text-muted);width:18px;height:18px;pointer-events:none;transition:color var(--transition-fast)}
.input-icon .form-input{padding-left:2.5rem}
.input-icon:focus-within .input-icon__icon{color:var(--accent)}

.login-error{background:var(--danger-light);color:var(--danger);padding:.65rem 1rem;border-radius:var(--radius-sm);font-size:.83rem;display:none;align-items:center;gap:.5rem;margin-bottom:1rem;animation:shake .4s ease}
.login-error.show{display:flex}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}
.login-error svg{width:16px;height:16px;flex-shrink:0}
.login-btn{width:100%;padding:.8rem;font-size:.95rem;font-weight:600;position:relative;border-radius:var(--radius-sm);background:var(--gradient);color:#fff;border:none;box-shadow:0 4px 16px rgba(99,102,241,.35);transition:all var(--transition-fast)}
.login-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(99,102,241,.45)}
.login-btn:active{transform:translateY(0);box-shadow:0 2px 8px rgba(99,102,241,.25)}
.login-btn:disabled{opacity:.6;cursor:not-allowed;transform:none !important}
.login-btn__text{transition:opacity var(--transition-fast)}
.login-btn.loading .login-btn__text{opacity:0}
.login-btn.loading .spinner{display:inline-block !important;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}
.login-footer{text-align:center;margin-top:1.5rem;font-size:.78rem;color:var(--text-muted)}

/* ── Theme Toggle ──────────────────────────────────────────── */
.theme-toggle{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);background:var(--bg-tertiary);border:1px solid var(--border);transition:all var(--transition-fast);cursor:pointer}
.theme-toggle:hover{color:var(--accent);border-color:var(--accent);transform:rotate(25deg)}
.theme-toggle:active{transform:rotate(25deg) scale(.9)}
.theme-toggle svg{width:18px;height:18px;transition:transform var(--transition-fast)}
.theme-toggle .icon-moon{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:block}

/* ── Toast / Alert ─────────────────────────────────────────── */
.toast-container{position:fixed;top:1rem;right:1rem;z-index:300;display:flex;flex-direction:column;gap:.5rem;pointer-events:none}
.toast{padding:.75rem 1.25rem;border-radius:var(--radius-sm);font-size:.85rem;font-weight:500;display:flex;align-items:center;gap:.6rem;box-shadow:var(--shadow-2xl);animation:toastIn .35s cubic-bezier(.34,1.56,.64,1);min-width:280px;max-width:400px;pointer-events:all;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.1)}
.toast--success{background:rgba(16,185,129,.92);color:#fff}
.toast--error{background:rgba(239,68,68,.92);color:#fff}
.toast--info{background:rgba(99,102,241,.92);color:#fff}
.toast--warning{background:rgba(249,115,22,.92);color:#fff}
@keyframes toastIn{from{opacity:0;transform:translateX(40px) scale(.85);filter:blur(4px)}to{opacity:1;transform:translateX(0) scale(1);filter:blur(0)}}
@keyframes toastOut{from{opacity:1;transform:translateX(0) scale(1);filter:blur(0)}to{opacity:0;transform:translateX(40px) scale(.85);filter:blur(4px)}}

/* ── Loader ────────────────────────────────────────────────── */
.spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite;display:inline-block}
.spinner--dark{border-color:rgba(0,0,0,.1);border-top-color:var(--accent)}
@keyframes spin{to{transform:rotate(360deg)}}
.page-loader{position:fixed;inset:0;background:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:999;transition:opacity .3s}
.page-loader.hide{opacity:0;pointer-events:none}
.page-loader__spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}

/* ── Skeleton loading ──────────────────────────────────────── */
.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--border) 50%,var(--bg-tertiary) 75%);background-size:200% 100%;animation:skeleton 1.5s ease infinite;border-radius:var(--radius-sm)}
@keyframes skeleton{0%{background-position:200% 0}100%{background-position:-200% 0}}
.skeleton-row{display:flex;gap:.75rem;padding:.75rem 1rem}
.skeleton-cell{height:16px;flex:1}

/* ── Empty state ───────────────────────────────────────────── */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-muted)}
.empty-state svg{width:56px;height:56px;margin:0 auto 1rem;opacity:.3;color:var(--text-muted)}
.empty-state__title{font-size:1rem;font-weight:600;color:var(--text-secondary);margin-bottom:.3rem}
.empty-state__text{font-size:.85rem;color:var(--text-muted)}

/* ── Confirm Dialog ────────────────────────────────────────── */
.confirm-dialog{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:250;display:flex;align-items:center;justify-content:center;padding:1rem;opacity:0;pointer-events:none;transition:opacity var(--transition)}
.confirm-dialog.active{opacity:1;pointer-events:all}
.confirm-dialog__box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:1.5rem;max-width:400px;width:100%;box-shadow:var(--shadow-2xl);transform:scale(.92) translateY(10px);transition:transform var(--transition-bounce)}
.confirm-dialog.active .confirm-dialog__box{transform:scale(1) translateY(0)}
.confirm-dialog__icon{width:48px;height:48px;border-radius:50%;background:var(--danger-light);color:var(--danger);display:flex;align-items:center;justify-content:center;margin:0 auto 1rem}
.confirm-dialog__icon svg{width:24px;height:24px}
.confirm-dialog__title{font-size:1.1rem;font-weight:600;text-align:center;margin-bottom:.5rem}
.confirm-dialog__text{font-size:.88rem;color:var(--text-secondary);text-align:center;margin-bottom:1.5rem;line-height:1.5}
.confirm-dialog__actions{display:flex;gap:.75rem;justify-content:center}

/* ── Scroll indicator for carousel ─────────────────────────── */
.scroll-indicator{display:flex;justify-content:center;gap:.35rem;margin-top:.75rem}
.scroll-dot{width:7px;height:7px;border-radius:50%;background:var(--border);transition:all var(--transition-fast);cursor:pointer}
.scroll-dot:hover{background:var(--text-muted)}
.scroll-dot.active{width:24px;border-radius:4px;background:var(--accent)}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInScale{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-20px)}to{opacity:1;transform:translateX(0)}}
@keyframes countUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .35s ease both}
  .fade-in-scale{animation:fadeInScale .35s ease both}
  .slide-in-right{animation:slideInRight .35s ease both}
  .slide-in-left{animation:slideInLeft .35s ease both}

  /* ── Glass Card Effect (admin dashboard) ──────────────────── */
  .glass-card{background:var(--bg-card);border:1px solid var(--border);position:relative;overflow:hidden}
  .glass-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--accent-subtle) 0%,transparent 50%,transparent 100%);opacity:0;transition:opacity var(--transition);pointer-events:none}
  .glass-card:hover::before{opacity:.5}
  .glass-card:hover{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent-light),var(--shadow)}
  .glass-card .stat-card__icon{position:relative;z-index:1}
  .glass-card .stat-card__value{position:relative;z-index:1}
.slide-in-left{animation:slideInLeft .35s ease both}

/* ── Page transition ───────────────────────────────────────── */
.page-transition{animation:fadeInUp .4s ease}

/* ── Responsive ────────────────────────────────────────────── */
@media(max-width:1024px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay.active{display:block}
  .main-content{margin-left:0}
  .menu-toggle{display:flex}
  .page-content{padding:1.25rem}
  .stats-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
}
@media(max-width:768px){
  .topbar{padding:0 1rem;gap:.5rem}
  .topbar__right .badge{display:none}
  .form-row{grid-template-columns:1fr}
  .table-toolbar{flex-direction:column;align-items:stretch}
  .site-card{min-width:240px;width:75vw}
  .stats-grid{grid-template-columns:1fr 1fr}
  .assignment-grid{grid-template-columns:1fr !important}
  .carousel-wrapper{padding:0 16px}
}
@media(max-width:480px){
  .login-card{padding:1.5rem}
  .site-card{min-width:100%;width:100%}
  .carousel-wrapper{padding:0 8px}
  .stats-grid{grid-template-columns:1fr}
  .modal{margin:0;max-height:95vh;border-radius:var(--radius)}
  .modal__body{padding:1.25rem}
  .topbar__title{display:none}
  .topbar__left{flex-shrink:0}
  .topbar__right{gap:.5rem;flex:1;justify-content:flex-end;min-width:0}
  .search-box{flex:1;max-width:100%}
  .topbar__right .btn{padding:.4rem .5rem;flex-shrink:0}
  .topbar__right .btn svg{margin:0}
  .topbar__right .btn span{display:none}
  .toast{min-width:auto;max-width:calc(100vw - 2rem)}
  .login-card{border-radius:var(--radius-xl);padding:1.75rem}
}