/* ============================================================
   components.css — Ahmed English UI Component Library
   Premium glassmorphism, animations, Inter font, dark-mode
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── Global token overrides ── */
:root {
  --font-body: 'Inter', system-ui, sans-serif;
  --font-h: 'Inter', system-ui, sans-serif;

  /* Brand palette */
  --clr-primary: #4F46E5;
  --clr-primary-light: #6366F1;
  --clr-primary-dark: #3730A3;
  --clr-accent: #06B6D4;
  --clr-success: #10B981;
  --clr-warning: #F59E0B;
  --clr-danger: #EF4444;

  /* Surfaces */
  --glass-bg: rgba(255,255,255,0.07);
  --glass-border: rgba(255,255,255,0.15);
  --glass-blur: 18px;

  /* Gradients */
  --grad-hero: linear-gradient(135deg, #1e1b4b 0%, #312e81 45%, #0c4a6e 100%);
  --grad-card: linear-gradient(145deg, rgba(255,255,255,0.09) 0%, rgba(255,255,255,0.04) 100%);
  --grad-accent: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);

  /* Shadow */
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.28);
  --shadow-card: 0 2px 16px rgba(79,70,229,0.10);
  --shadow-hover: 0 8px 32px rgba(79,70,229,0.22);
}

body { font-family: var(--font-body); }

/* ── Hero badge ── */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 15px;
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.40);
  border-radius: 999px;
  font-size: 0.83rem;
  font-weight: 700;
  color: #059669;
  letter-spacing: 0.02em;
  transition: background 0.3s, border-color 0.3s, color 0.3s;
}
.hero-badge .live {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  animation: pulse-green 1.8s infinite;
  flex-shrink: 0;
}
.hero-badge.closed {
  background: rgba(239,68,68,0.10);
  border-color: rgba(239,68,68,0.30);
  color: #DC2626;
}
.hero-badge.closed .live {
  background: #EF4444;
  animation: pulse-red 1.8s infinite;
}
@keyframes pulse-green {
  0%,100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.4); }
  50%      { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
}
@keyframes pulse-red {
  0%,100% { box-shadow: 0 0 0 0 rgba(239,68,68,0.4); }
  50%      { box-shadow: 0 0 0 6px rgba(239,68,68,0); }
}

/* ── Admin: account-type selector ── */
.role-select {
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 10px;
  border-radius: 9px;
  border: 1px solid var(--c-border, #E5E7EB);
  background: var(--c-surface, #fff);
  color: var(--c-ink-2, #374151);
  cursor: pointer;
  appearance: auto;
}
.role-select:focus { outline: 2px solid var(--c-accent, #4F46E5); outline-offset: 1px; }
.role-select:disabled { opacity: 0.6; cursor: wait; }

/* ── KPI / Stat cards ── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}
.kpi-card {
  background: var(--c-card, #fff);
  border: 1px solid var(--c-card-border, #E5E7EB);
  border-radius: 16px;
  padding: 20px 22px 14px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s, transform 0.25s;
  position: relative;
  overflow: hidden;
}
.kpi-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-accent);
  border-radius: 16px 16px 0 0;
  opacity: 0;
  transition: opacity 0.25s;
}
.kpi-card:hover::before { opacity: 1; }
.kpi-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-ink-3, #9CA3AF);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.kpi-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--c-ink-1, #111827);
  line-height: 1;
  margin-bottom: 6px;
}
.kpi-trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}
.kpi-trend.up      { background: #ECFDF5; color: #059669; }
.kpi-trend.down    { background: #FFF1F2; color: #E11D48; }
.kpi-trend.neutral { background: #FFF7ED; color: #C2410C; }

/* Sparkline SVG wrapper */
.kpi-spark {
  margin-top: 12px;
  height: 32px;
  width: 100%;
  overflow: hidden;
}
.kpi-spark svg { width: 100%; height: 100%; }

/* ── Progress Ring ── */
.ring {
  position: relative;
  width: 90px;
  height: 90px;
  flex-shrink: 0;
}
.ring svg {
  width: 90px;
  height: 90px;
  transform: rotate(-90deg);
}
.ring .bg-ring { stroke: rgba(255,255,255,0.2); }
.ring .fg-ring {
  stroke-linecap: round;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.22,1,0.36,1);
}
.ring .val {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
}
.ring .rl {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.ring .rl strong { font-size: 0.95rem; font-weight: 700; }
.ring .rl small  { font-size: 0.78rem; opacity: 0.75; }

/* ── Timeline ── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  list-style: none;
  margin: 0; padding: 0;
}
.tl-item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 0 14px;
  padding-bottom: 20px;
  position: relative;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-dot-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.tl-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-primary, #4F46E5);
  border: 2px solid #fff;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.2);
  flex-shrink: 0;
  margin-top: 4px;
}
.tl-dot.done  { background: #10B981; box-shadow: 0 0 0 3px rgba(16,185,129,0.2); }
.tl-dot.warn  { background: #F59E0B; box-shadow: 0 0 0 3px rgba(245,158,11,0.2); }
.tl-line {
  flex: 1;
  width: 2px;
  background: var(--c-border, #E5E7EB);
  margin-top: 4px;
}
.tl-content { padding-top: 0; }
.tl-title   { font-size: 0.9rem; font-weight: 700; color: var(--c-ink-1, #111); margin-bottom: 2px; }
.tl-meta    { font-size: 0.76rem; color: var(--c-ink-3, #9CA3AF); margin-bottom: 4px; }
.tl-body    { font-size: 0.84rem; color: var(--c-ink-2, #374151); line-height: 1.5; }

/* ── Homework Checklist ── */
.hw-form {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.hw-input {
  flex: 1;
  min-width: 0;
  padding: 9px 13px;
  border: 1.5px solid var(--c-border, #E5E7EB);
  border-radius: 10px;
  font-size: 0.88rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  background: var(--c-soft, #F9FAFB);
  color: var(--c-ink-1, #111);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.hw-input:focus {
  outline: none;
  border-color: #4F46E5;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.12);
}
.hw-add-btn {
  padding: 9px 16px;
  background: linear-gradient(135deg, #4F46E5, #06B6D4);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  white-space: nowrap;
}
.hw-add-btn:hover { opacity: 0.9; transform: translateY(-1px); }

.hw-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--c-soft, #F9FAFB);
  border: 1px solid var(--c-border, #E5E7EB);
  margin-bottom: 8px;
  transition: background 0.2s, opacity 0.2s;
}
.hw-item.done {
  opacity: 0.55;
  background: rgba(16,185,129,0.06);
  border-color: rgba(16,185,129,0.22);
}
.hw-cb {
  margin-top: 2px;
  width: 18px;
  height: 18px;
  accent-color: #4F46E5;
  flex-shrink: 0;
  cursor: pointer;
}
.hw-text-wrap { flex: 1; min-width: 0; }
.hw-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-ink-1, #111);
  word-break: break-word;
}
.hw-item.done .hw-text { text-decoration: line-through; color: var(--c-ink-3, #9CA3AF); }
.hw-meta { font-size: 0.74rem; color: var(--c-ink-3, #9CA3AF); margin-top: 2px; }
.hw-del {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-ink-3, #9CA3AF);
  padding: 2px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
  display: flex;
  align-items: center;
  line-height: 1;
}
.hw-del:hover { color: #EF4444; background: #FFF1F2; }

/* ── Glass card ── */
.glass-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 20px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.28);
}

/* ── Micro-animations ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.5s ease both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ── Dark mode overrides ── */
@media (prefers-color-scheme: dark) {
  .kpi-card {
    background: #1E1B4B;
    border-color: #312E81;
    color: #E0E7FF;
  }
  .kpi-label { color: #818CF8; }
  .kpi-value { color: #F0F4FF; }
  .hw-item { background: #1E1B4B; border-color: #312E81; }
  .hw-input { background: #1E1B4B; border-color: #312E81; color: #E0E7FF; }
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .ring { width: 72px; height: 72px; }
  .ring svg { width: 72px; height: 72px; }
}
@media (max-width: 400px) {
  .kpi-grid { grid-template-columns: 1fr; }
}

/* ============ Admin: Modal dialogs (Add Student / Note / Homework) ============ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1200;
  display: flex; align-items: center; justify-content: center;
  background: rgba(15, 23, 42, 0.55); padding: 20px;
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: var(--c-surface, #fff); color: var(--c-ink, #111827);
  border-radius: 16px; width: 100%; max-width: 460px; max-height: 90vh;
  overflow-y: auto; padding: 22px; box-shadow: 0 25px 60px rgba(0,0,0,0.25);
  border: 1px solid var(--c-border, #E5E7EB);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px;
}
.modal-head h3 { margin: 0; font-size: 1.15rem; }
.modal-x {
  border: 0; background: transparent; font-size: 1.6rem; line-height: 1;
  color: var(--c-ink-3, #9CA3AF); cursor: pointer; padding: 0 4px;
}
.modal-x:hover { color: var(--c-ink, #111827); }
.modal .kpi-label { display: block; margin: 12px 0 6px; }
.modal textarea.field { height: auto; min-height: 90px; padding-top: 12px; padding-bottom: 12px; resize: vertical; }
.modal select.field { cursor: pointer; }
.modal .field {
  height: 46px; width: 100%; box-sizing: border-box; padding: 0 14px;
  border: 1.5px solid var(--c-border, #E5E7EB); border-radius: 10px;
  background: var(--c-surface, #fff); color: var(--c-ink, #111827);
  font-size: 0.92rem; font-family: var(--font-body, 'Inter', sans-serif);
}
.modal .field:focus { outline: none; border-color: #4F46E5; box-shadow: 0 0 0 3px rgba(79,70,229,0.12); }
.tool-row {
  display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px;
  background: var(--c-soft, #F9FAFB); border: 1px solid var(--c-border, #E5E7EB);
  border-radius: 12px; cursor: pointer; color: inherit; transition: transform 0.15s, border-color 0.15s;
}
.tool-row:hover { transform: translateY(-2px); border-color: var(--c-accent, #4F46E5); }
.tool-row .t-ic {
  flex: 0 0 auto; width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-accent-soft, #EEF2FF); color: var(--c-accent, #4F46E5);
}
.tool-row .t-ic svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tool-row strong { display: block; font-size: 0.95rem; }
.tool-row p { margin: 2px 0 0; font-size: 0.82rem; color: var(--c-ink-3, #9CA3AF); }