/* ═══════════════════════════════════════════════════════
   HOMEPAGE.CSS — All Homepage Sections
═══════════════════════════════════════════════════════ */

/* ── HOMEPAGE WRAPPER ── */
.homepage-center { width: 100%; }

#brand-homepage { background: var(--body-bg); }

/* ── HEADLINE ── */
#homepage-headline {
  text-align: center;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-700);
  padding: 52px 24px 36px;
  letter-spacing: -0.3px;
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ── FEATURE TABLE ── */
.feature-table {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  border-collapse: separate;
  border-spacing: 18px;
  padding: 0 6px 16px;
}

.feature-table th {
  font-weight: normal;
  vertical-align: top;
  padding: 0;
}

/* Feature card */
.feature-table th > a,
.homepage-first-images > a {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--t-normal), transform var(--t-normal), border-color var(--t-normal);
  height: 100%;
}

.feature-table th > a:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: rgba(219,63,89,0.25);
}

/* Icon image box */
.feature-img-box {
  width: 100%;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.feature-img-box svg { filter: drop-shadow(0 4px 12px rgba(0,0,0,0.2)); }

.feature-img-box::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.1) 100%);
}

.homepage-first-headline {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-700);
  padding: 16px 18px 6px;
  letter-spacing: -0.2px;
}

.homepage-first-text {
  font-size: 13px;
  color: var(--text-400);
  padding: 0 18px 18px;
  line-height: 1.6;
  font-weight: 400;
}

/* ── SECOND BLOCK — MATH HELP TAILORED ── */
#homepage-second-block {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  padding: 60px 24px;
  margin-top: 24px;
}

#homepage-second-block-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

#homepage-second-headline {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: #fff;
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: -0.3px;
}

#homepage-second-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

#homepage-second-inner-practice {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  min-width: 280px;
}

#homepage-practice-img { display: block; flex-shrink: 0; }

/* Practice chart visual */
.practice-visual {
  width: 110px;
  height: 100px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--r-lg);
  padding: 14px 12px 10px;
  display: flex;
  align-items: flex-end;
}

.practice-chart {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 100%;
  width: 100%;
}

.bar {
  flex: 1;
  background: rgba(255,255,255,0.2);
  border-radius: 3px 3px 0 0;
  transition: height 0.5s ease;
}

.bar.active { background: var(--red); }

#homepage-practice-block-all { flex: 1; }

#homepage-practice-block { margin-bottom: 20px; }

#homepage-practice-headline {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

#homepage-practice-body {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.65;
}

#homepage-practice-include {
  font-size: 11px;
  font-weight: 600;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 5px;
}

#homepage-practice-headline2 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

#homepage-practice-body2 {
  font-size: 13px;
  color: rgba(255,255,255,0.50);
  line-height: 1.65;
}

#homepage-practice-button {
  display: inline-flex;
  align-items: center;
  background: var(--red);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 13px 32px;
  border-radius: var(--r-full);
  text-decoration: none;
  transition: background var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast);
  box-shadow: 0 4px 16px rgba(219,63,89,0.40);
  white-space: nowrap;
  letter-spacing: 0.3px;
  margin-top: 12px;
}

#homepage-practice-button:hover {
  background: var(--red-dark);
  box-shadow: 0 6px 22px rgba(219,63,89,0.55);
  transform: translateY(-2px);
}

/* ── APP DOWNLOAD SECTION ── */
#homepage-solver {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: var(--max-w);
  margin: 60px auto 0;
  padding: 0 24px;
  flex-wrap: wrap;
}

/* Phone mockup */
.app-preview-visual { flex-shrink: 0; }

.phone-frame {
  width: 180px;
  height: 320px;
  background: #1e293b;
  border-radius: 28px;
  border: 3px solid rgba(255,255,255,0.12);
  padding: 28px 16px 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.08);
  position: relative;
}

.phone-frame::before {
  content: '';
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px; height: 5px;
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
}

.phone-screen {
  background: #0f172a;
  border-radius: 14px;
  height: 100%;
  padding: 16px 12px;
  overflow: hidden;
}

.phone-eq {
  font-family: 'Roboto', monospace;
  font-size: 13px;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
  margin-bottom: 12px;
  padding: 8px 10px;
  background: rgba(255,255,255,0.07);
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.1);
}

.phone-step {
  font-size: 10px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 5px;
  padding-left: 4px;
}

.phone-ans {
  font-family: 'Roboto', monospace;
  font-size: 15px;
  font-weight: 700;
  color: var(--red);
  margin-top: 12px;
  padding: 8px 10px;
  background: rgba(219,63,89,0.12);
  border-radius: 6px;
  border: 1px solid rgba(219,63,89,0.25);
}

/* App download info */
#homepage-solver-banner { flex: 1; }

#homepage-solver-headline {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

#homepage-solver-text {
  font-size: 14px;
  color: rgba(255,255,255,0.50);
  margin-bottom: 24px;
}

#homepage-solver-apps {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  border-radius: var(--r-lg);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  letter-spacing: 0.2px;
}

.app-badge.android {
  background: #1a73e8;
  box-shadow: 0 4px 14px rgba(26,115,232,0.35);
}

.app-badge.ios {
  background: #1c1c1e;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 4px 14px rgba(0,0,0,0.30);
}

.app-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.30);
}

/* ── EXPLORE MORE ── */
#homepage-explore {
  padding: 60px 24px 48px;
  max-width: var(--max-w);
  margin: 0 auto;
}

#homepage-explore-headline {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 700;
  color: var(--text-700);
  text-align: center;
  margin-bottom: 28px;
  letter-spacing: -0.2px;
}

#homepage-explore-board {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.explore-arrow {
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 20px;
  color: var(--text-400);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-fast);
  flex-shrink: 0;
  line-height: 1;
}
.explore-arrow:hover { background: var(--red); color: #fff; border-color: var(--red); }

.explore-track {
  display: flex;
  gap: 12px;
  flex: 1;
  justify-content: center;
  flex-wrap: nowrap;
  overflow: hidden;
}

.explore-item {
  width: 80px;
  height: 80px;
  background: var(--nav-bg);
  border-radius: var(--r-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--t-normal);
  border: 2px solid transparent;
  flex-shrink: 0;
  opacity: 0.55;
}

.explore-item:hover,
.explore-item.active {
  opacity: 1;
  border-color: var(--red);
  background: #1e2a42;
  box-shadow: 0 4px 16px rgba(219,63,89,0.25);
  transform: translateY(-2px);
}

#homepage-explore-body {
  text-align: center;
  padding: 0 20px;
}

#homepage-explore-body-headline {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-700);
  margin-bottom: 8px;
  letter-spacing: -0.1px;
}

#homepage-explore-body-text {
  font-size: 14px;
  color: var(--text-400);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ── POPULAR CALCULATORS ── */
#popular-calculators {
  padding: 48px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

#popular-calculators-headline {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  color: var(--text-700);
  margin-bottom: 20px;
  letter-spacing: -0.2px;
}

#popular-calculators-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

#popular-calculators-links a {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 13px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-700);
  text-decoration: none;
  transition: all var(--t-fast);
  border-left: 3px solid transparent;
}

#popular-calculators-links a:hover {
  border-left-color: var(--red);
  background: var(--red-light);
  color: var(--red);
  transform: translateX(3px);
  box-shadow: var(--shadow-sm);
}

.pop-arrow {
  color: var(--red);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
  transition: transform var(--t-fast);
}

#popular-calculators-links a:hover .pop-arrow { transform: translateX(3px); }

/* ── INSTANT CALCULATORS ── */
.instant-calculators-section {
  padding: 48px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.homepage-calculators-headline {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  color: var(--text-700);
  margin-bottom: 24px;
  letter-spacing: -0.2px;
}

.calculator-boxes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}

/* Single category card */
.short-category {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: box-shadow var(--t-normal), transform var(--t-normal), border-color var(--t-normal);
}

.short-category:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: rgba(219,63,89,0.18);
}

.short-title-div {
  padding: 0;
  border-bottom: 1px solid var(--border);
}

.short-title-div a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  transition: background var(--t-fast);
}

.short-title-div a:hover { background: #fafbff; }

/* Category icon box */
.cat-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.short-calculators-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-700);
  letter-spacing: -0.1px;
}

.short-body-div {
  padding: 14px 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.short-calculators-names {
  display: block;
  font-size: 13px;
  color: var(--text-500);
  text-decoration: none;
  padding: 5px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), padding-left var(--t-fast);
  font-weight: 400;
}

.short-calculators-names:hover {
  color: var(--red);
  padding-left: 6px;
}

.see-more {
  display: inline-block;
  font-size: 12px;
  color: var(--red);
  font-weight: 600;
  margin-top: 10px;
  text-decoration: none;
  letter-spacing: 0.2px;
  transition: opacity var(--t-fast);
}
.see-more:hover { opacity: 0.75; }

/* ── MARKDOWN / ABOUT SECTION ── */
#markdown {
  padding: 56px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

#markdown h2 {
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 700;
  color: var(--text-700);
  margin: 36px 0 12px;
  letter-spacing: -0.3px;
}

#markdown h2:first-child { margin-top: 0; }

#markdown h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-700);
  margin: 24px 0 10px;
}

#markdown p {
  font-size: 14.5px;
  color: var(--text-400);
  line-height: 1.8;
  margin-bottom: 14px;
  font-weight: 400;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .feature-table { border-spacing: 10px; }
  #homepage-second-inner { flex-direction: column; }
  #homepage-solver { flex-direction: column; align-items: flex-start; margin-top: 36px; }
  .explore-track { flex-wrap: wrap; }
  .explore-item { width: 70px; height: 70px; }
}

@media (max-width: 640px) {
  .calculator-boxes { grid-template-columns: 1fr 1fr; }
  #popular-calculators-links { grid-template-columns: 1fr; }
  .feature-table { display: flex; flex-direction: column; }
  .feature-table tr { display: flex; flex-direction: column; }
  .feature-table th { display: block; }
  #homepage-headline { padding: 36px 16px 24px; }
}

@media (max-width: 420px) {
  .calculator-boxes { grid-template-columns: 1fr; }
}