/* ══════════════════════════════════════════════════════════
   CodingInABox — LMS shared styles + component kit
   Imports the design tokens (single source of truth) then layers
   the component classes on top. Link ONLY this file on a page and
   you get tokens + components. Tailwind CDN still provides utilities.
   ══════════════════════════════════════════════════════════ */
@import url("./tokens.css");

body { background: var(--color-bg); color: var(--text-1); -webkit-font-smoothing: antialiased; font-family: var(--font-sans); }

/* ── Accessibility helpers ── */
:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-1);
}
.skip-link { position: absolute; left: -999px; top: 0; background: var(--color-primary); color: var(--text-on-primary); padding: var(--space-2) var(--space-3); z-index: 999; }
.skip-link:focus { left: var(--space-2); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ── Backgrounds / brand effects ── */
.cyber-grid {
  background-image: linear-gradient(to right, rgba(0,240,255,0.06) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(0,240,255,0.06) 1px, transparent 1px);
  background-size: 50px 50px;
}
.circuit-overlay { background-image: radial-gradient(var(--color-primary) .5px, transparent .5px); background-size: 20px 20px; opacity: .15; }
.neon-text-cyan { text-shadow: 0 0 10px rgba(0,240,255,0.7), 0 0 20px rgba(0,240,255,0.4); }
.neon-text-magenta { text-shadow: 0 0 10px rgba(255,0,229,0.7), 0 0 20px rgba(255,0,229,0.4); }
.mono-font, .mono { font-family: var(--font-mono); }

.logo-animated { animation: logoFloat 3s ease-in-out infinite; filter: drop-shadow(0 2px 8px rgba(230,27,121,0.3)); transition: filter .3s var(--ease), transform .3s var(--ease); }
.logo-animated:hover { filter: drop-shadow(0 4px 16px rgba(230,27,121,0.5)); transform: scale(1.05); }
@keyframes logoFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }

/* ── Navigation ── */
.glass-nav {
  background: rgba(5,11,26,0.95); backdrop-filter: blur(24px);
  border-bottom: 2px solid var(--color-primary);
  box-shadow: 0 4px 30px rgba(0,240,255,0.15), 0 1px 0 rgba(0,240,255,0.3);
}
.nav-dropdown { position: relative; }
.nav-dropdown-menu { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); min-width: 220px; background: rgba(5,11,26,0.98); backdrop-filter: blur(24px); border: 1px solid var(--color-primary); border-top: 2px solid var(--color-primary); box-shadow: 0 8px 30px rgba(0,240,255,0.2); padding: var(--space-2) 0; z-index: 100; }
.nav-dropdown:hover .nav-dropdown-menu, .nav-dropdown:focus-within .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a { display: block; padding: var(--space-2) var(--space-5); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; color: var(--text-3); transition: all 0.2s var(--ease); }
.nav-dropdown-menu a:hover { color: var(--color-primary); background: var(--color-primary-soft); padding-left: 24px; }

/* ── BUTTONS (component kit) ──────────────────────────────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-weight: 700; border: 1px solid transparent; border-radius: var(--radius-1); cursor: pointer;
  transition: all .25s var(--ease); text-decoration: none; line-height: 1; white-space: nowrap;
  padding: var(--space-3) var(--space-5); font-size: 14px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-sm { padding: var(--space-2) var(--space-3); font-size: 12px; }
.btn-lg { padding: var(--space-4) var(--space-6); font-size: 16px; }
.btn-primary, .cta-cyber { background: linear-gradient(90deg, #00F0FF 0%, #A855F7 50%, #FF00E5 100%); color: #fff; box-shadow: var(--shadow-glow-cyan); }
.btn-primary:hover, .cta-cyber:hover { box-shadow: var(--shadow-glow-magenta); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--color-primary); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--color-primary-soft); }
.btn-danger { background: rgba(248,113,113,0.12); color: var(--color-error); border-color: rgba(248,113,113,0.4); }
.btn-danger:hover { background: rgba(248,113,113,0.2); }

/* ── CARDS ── */
.card, .dark-glass { background: var(--color-surface); backdrop-filter: blur(12px); border: 1px solid var(--border); border-radius: var(--radius-2); transition: all .3s var(--ease); }
.card:hover, .dark-glass:hover { border-color: var(--color-primary); box-shadow: var(--shadow-glow-cyan); }

/* ── FORMS ── */
input, textarea, select { background: var(--color-surface-3); border: 1px solid var(--border); color: var(--text-1); border-radius: var(--radius-1); }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--color-primary) !important; box-shadow: 0 0 0 3px rgba(0,240,255,0.18) !important; }
label { color: var(--color-primary); }

/* ── BADGES ── */
.tier-badge { font-family: var(--font-mono); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; padding: 2px 8px; border: 1px solid; border-radius: var(--radius-1); }
.tier-A, .badge-junior { color: var(--color-success); border-color: rgba(74,222,128,0.4); background: rgba(74,222,128,0.08); }
.tier-B, .badge-senior { color: var(--color-primary); border-color: var(--border-strong); background: var(--color-primary-soft); }

/* ── PROGRESS (bar + ring) ── */
.progress-track { height: 6px; background: var(--color-primary-soft); border-radius: var(--radius-round); overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); transition: width .5s var(--ease); }
.progress-ring { --val: 0; width: 56px; height: 56px; border-radius: 50%;
  background: conic-gradient(var(--color-primary) calc(var(--val) * 1%), var(--color-primary-soft) 0);
  display: grid; place-items: center; }
.progress-ring::after { content: attr(data-label); width: 44px; height: 44px; border-radius: 50%; background: var(--color-bg); display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--text-1); }

/* ── ALERTS / TOAST (aria-live target) ── */
.alert { border-radius: var(--radius-1); padding: var(--space-3) var(--space-4); font-size: 14px; border: 1px solid; }
.alert-ok { background: rgba(74,222,128,0.1); border-color: rgba(74,222,128,0.4); color: var(--color-success); }
.alert-warn { background: rgba(251,191,36,0.1); border-color: rgba(251,191,36,0.4); color: var(--color-warning); }
.alert-err { background: rgba(248,113,113,0.1); border-color: rgba(248,113,113,0.4); color: var(--color-error); }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 200; padding: 12px 20px; font-size: 13px; border-radius: var(--radius-1); }
.toast-ok { background: rgba(34,197,94,0.12); border: 1px solid rgba(34,197,94,0.4); color: var(--color-success); }
.toast-err { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.4); color: var(--color-error); }

/* ── TABS ── */
.tabs { display: flex; gap: var(--space-2); border-bottom: 1px solid var(--border); }
.tab { padding: var(--space-2) var(--space-4); color: var(--text-3); border-bottom: 2px solid transparent; cursor: pointer; background: none; font-weight: 600; }
.tab[aria-selected="true"] { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* ── MODAL ── */
.modal-backdrop { position: fixed; inset: 0; background: rgba(2,6,13,0.7); backdrop-filter: blur(4px); z-index: 300; display: grid; place-items: center; }
.modal { background: var(--color-surface-2); border: 1px solid var(--border-strong); border-radius: var(--radius-2); padding: var(--space-6); max-width: 520px; box-shadow: var(--shadow-card); }

/* ── LMS-specific (course/lesson) ── */
.module-rail { position: relative; padding-left: 28px; }
.module-rail::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.lesson-row { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-1); transition: all .2s var(--ease); }
.lesson-row:hover { border-color: var(--color-primary); background: rgba(0,240,255,0.04); }
.lesson-row.locked { opacity: .55; }
.lesson-dot { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--border-strong); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 12px; }
.lesson-dot.done { background: var(--color-primary); border-color: var(--color-primary); color: var(--text-on-primary); }
.lesson-body { line-height: 1.7; color: var(--text-2); }
.lesson-body p { margin: 0 0 1rem; }
.lesson-body ul { list-style: disc; padding-left: 1.4rem; margin: 0 0 1rem; }
.lesson-body li { margin: 0.3rem 0; }
.lesson-body strong { color: var(--text-1); }
.lesson-body h3, .lesson-body h4 { color: var(--text-1); text-transform: uppercase; letter-spacing: 0.05em; margin: 1.2rem 0 0.6rem; }
.lesson-body code { background: var(--color-primary-soft); padding: 1px 6px; border-radius: 4px; font-family: var(--font-mono); color: #7dd3fc; }
.video-frame { aspect-ratio: 16/9; width: 100%; background: var(--color-surface-3); border: 1px solid var(--border); border-radius: var(--radius-1); }
.slide-thumb { border: 1px solid var(--border); background: var(--color-surface-3); border-radius: var(--radius-1); }