/* ============================================================
   EduCoupons (educoupons.pro) — "Clean EdTech" Design System
   Light, trustworthy, modern. Indigo primary / Emerald accent.
   ============================================================ */

:root {
  --c-primary: #4f46e5;       /* indigo-600 */
  --c-primary-dark: #4338ca;  /* indigo-700 */
  --c-primary-soft: #eef2ff;  /* indigo-50 */
  --c-accent: #059669;        /* emerald-600 */
  --c-accent-soft: #ecfdf5;   /* emerald-50 */
  --c-ink: #0f172a;           /* slate-900 */
  --c-body: #334155;          /* slate-700 */
  --c-muted: #64748b;         /* slate-500 */
  --c-line: #e2e8f0;          /* slate-200 */
  --c-bg: #f8fafc;            /* slate-50 */
  --c-warn-bg: #fffbeb;       /* amber-50 */
  --c-warn-line: #fcd34d;     /* amber-300 */
  --radius: 0.75rem;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, .06), 0 4px 14px rgba(15, 23, 42, .06);
  --shadow-card-hover: 0 4px 10px rgba(15, 23, 42, .08), 0 12px 28px rgba(79, 70, 229, .12);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--c-body);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { color: var(--c-ink); font-weight: 700; letter-spacing: -0.01em; }

/* ---------- Header / nav ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--c-line); }
.nav-link { font-size: .9rem; font-weight: 500; color: var(--c-body); padding: .4rem .65rem; border-radius: .5rem; transition: all .15s; }
.nav-link:hover { color: var(--c-primary); background: var(--c-primary-soft); }
.nav-link.active { color: var(--c-primary); background: var(--c-primary-soft); font-weight: 600; }

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  background: var(--c-primary); color: #fff !important; font-weight: 600;
  padding: .8rem 1.5rem; border-radius: .65rem; font-size: 1rem;
  box-shadow: 0 4px 14px rgba(79,70,229,.30); transition: all .2s; text-decoration: none;
}
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79,70,229,.40); }
.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  background: #fff; color: var(--c-primary) !important; font-weight: 600;
  padding: .8rem 1.5rem; border-radius: .65rem; font-size: 1rem;
  border: 1.5px solid var(--c-primary); transition: all .2s; text-decoration: none;
}
.btn-secondary:hover { background: var(--c-primary-soft); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: .4rem; color: var(--c-primary);
  font-weight: 600; font-size: .95rem; text-decoration: none;
}
.btn-ghost:hover { text-decoration: underline; }

/* ---------- DealCard ---------- */
.deal-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow-card); transition: all .2s;
  display: flex; flex-direction: column; gap: .75rem;
}
.deal-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); border-color: #c7d2fe; }
.deal-badge {
  display: inline-flex; align-items: center; gap: .35rem; align-self: flex-start;
  background: var(--c-accent-soft); color: var(--c-accent); font-size: .75rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  padding: .25rem .65rem; border-radius: 999px;
}
.deal-badge.badge-hot { background: #fef2f2; color: #dc2626; }
.deal-badge.badge-info { background: var(--c-primary-soft); color: var(--c-primary); }

/* ---------- CouponChip (click to copy) ---------- */
.coupon-chip {
  display: inline-flex; align-items: center; gap: .6rem; cursor: pointer;
  border: 2px dashed var(--c-primary); background: var(--c-primary-soft);
  color: var(--c-primary); font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-weight: 700; font-size: 1.05rem; letter-spacing: .06em;
  padding: .55rem 1.1rem; border-radius: .65rem; transition: all .15s; user-select: none;
}
.coupon-chip:hover { background: #e0e7ff; }
.coupon-chip .chip-hint { font-family: 'Inter', sans-serif; font-size: .7rem; font-weight: 600; letter-spacing: .02em; color: var(--c-muted); text-transform: uppercase; }
.coupon-chip.copied { border-color: var(--c-accent); background: var(--c-accent-soft); color: var(--c-accent); }

/* ---------- Tables (PricingTable / CompareTable) ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius); box-shadow: var(--shadow-card); }
.data-table { width: 100%; border-collapse: collapse; font-size: .92rem; background: #fff; min-width: 560px; }
.data-table th {
  background: var(--c-primary-soft); color: var(--c-ink); font-weight: 700;
  text-align: left; padding: .85rem 1rem; border-bottom: 2px solid #c7d2fe; white-space: nowrap;
}
.data-table td { padding: .8rem 1rem; border-bottom: 1px solid var(--c-line); vertical-align: top; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:nth-child(even) td { background: var(--c-bg); }
.data-table .cell-yes { color: var(--c-accent); font-weight: 600; }
.data-table .cell-no { color: #dc2626; font-weight: 600; }
.data-table .cell-hl { color: var(--c-primary); font-weight: 700; }

/* ---------- FAQ accordion ---------- */
.faq-item { border: 1px solid var(--c-line); border-radius: .65rem; background: #fff; overflow: hidden; }
.faq-item + .faq-item { margin-top: .75rem; }
.faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  text-align: left; font-weight: 600; color: var(--c-ink); padding: 1rem 1.25rem;
  cursor: pointer; background: none; border: none; font-size: 1rem;
}
.faq-q:hover { color: var(--c-primary); }
.faq-q .faq-icon { transition: transform .2s; color: var(--c-primary); flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 1.25rem 1.1rem; color: var(--c-body); line-height: 1.65; }
.faq-item.open .faq-a { display: block; }

/* ---------- Callouts ---------- */
.callout-verify {
  background: var(--c-warn-bg); border: 1px solid var(--c-warn-line); border-radius: .65rem;
  padding: .9rem 1.1rem; font-size: .9rem; color: #92400e; display: flex; gap: .6rem; align-items: flex-start;
}
.callout-tip {
  background: var(--c-accent-soft); border: 1px solid #6ee7b7; border-radius: .65rem;
  padding: .9rem 1.1rem; font-size: .92rem; color: #065f46; display: flex; gap: .6rem; align-items: flex-start;
}
.callout-info {
  background: var(--c-primary-soft); border: 1px solid #c7d2fe; border-radius: .65rem;
  padding: .9rem 1.1rem; font-size: .92rem; color: #3730a3; display: flex; gap: .6rem; align-items: flex-start;
}
.verdict-box {
  background: linear-gradient(135deg, var(--c-primary-soft), #fff); border: 1.5px solid #c7d2fe;
  border-left: 5px solid var(--c-primary); border-radius: var(--radius); padding: 1.5rem;
}

/* ---------- Article layout ---------- */
.article-body { font-size: 1.05rem; line-height: 1.75; }
.article-body h2 { font-size: 1.65rem; margin: 2.5rem 0 1rem; scroll-margin-top: 90px; }
.article-body h3 { font-size: 1.25rem; margin: 1.75rem 0 .75rem; scroll-margin-top: 90px; }
.article-body p { margin-bottom: 1rem; }
.article-body ul, .article-body ol { margin: 0 0 1.15rem 1.4rem; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: .45rem; }
.article-body a:not(.btn-primary):not(.btn-secondary) { color: var(--c-primary); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
.article-body strong { color: var(--c-ink); }

.toc-box { background: var(--c-bg); border: 1px solid var(--c-line); border-radius: var(--radius); padding: 1.25rem 1.5rem; }
.toc-box a { color: var(--c-primary); font-weight: 500; font-size: .92rem; text-decoration: none; }
.toc-box a:hover { text-decoration: underline; }

.step-num {
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: 2rem; height: 2rem; border-radius: 999px; background: var(--c-primary);
  color: #fff; font-weight: 700; font-size: .95rem;
}

/* ---------- Pros / Cons ---------- */
.pros-box, .cons-box { border-radius: var(--radius); padding: 1.4rem; border: 1px solid; }
.pros-box { background: var(--c-accent-soft); border-color: #a7f3d0; }
.cons-box { background: #fef2f2; border-color: #fecaca; }
.pros-box li, .cons-box li { display: flex; gap: .6rem; margin-bottom: .6rem; line-height: 1.5; }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-ink); color: #cbd5e1; }
.site-footer a { color: #cbd5e1; font-size: .9rem; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-heading { color: #fff; font-weight: 700; font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: .9rem; }

/* ---------- Misc ---------- */
.eyebrow { color: var(--c-primary); font-weight: 700; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; }
.last-updated { display: inline-flex; align-items: center; gap: .45rem; font-size: .85rem; color: var(--c-muted); }
.copy-toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--c-ink); color: #fff; font-weight: 600; font-size: .9rem;
  padding: .7rem 1.4rem; border-radius: 999px; opacity: 0; pointer-events: none;
  transition: all .25s; z-index: 100; box-shadow: 0 8px 24px rgba(0,0,0,.25);
}
.copy-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 768px) {
  .article-body { font-size: 1rem; }
  .article-body h2 { font-size: 1.4rem; }
}