/* CalcFin — Public promotional site. Modern, responsive, single-page. Light theme. */

:root {
  --color-bg: #f8f9fc;
  --color-surface: #ffffff;
  --color-surface-2: #f0f2f7;
  --color-text: #1a1a24;
  --color-text-muted: #5c5c6e;
  --color-heading: #0f0f14;
  --color-primary: #3d5afe;
  --color-primary-light: #536dfe;
  --color-secondary: #7c4dff;
  --color-accent: #e65100;
  --color-accent-light: #ffab00;
  --color-success: #00c853;
  --color-teal: #26a69a;
  --color-indigo: #5c6bc0;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-strong: rgba(0, 0, 0, 0.12);
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Sora', var(--font-sans);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.12);
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-top: 0; }
h3 { font-size: 1.25rem; }

p {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary);
}

/* Layout */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 4rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  margin-bottom: 0.75rem;
}

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 2rem 0 4rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 80%;
  height: 120%;
  background: radial-gradient(ellipse, rgba(61, 90, 254, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -20%;
  width: 70%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(124, 77, 255, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.hero h1 {
  color: var(--color-heading);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 28em;
  margin-bottom: 1.5rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #ff8f00);
  color: #fff;
  box-shadow: 0 8px 24px rgba(230, 81, 0, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 12px 32px rgba(230, 81, 0, 0.45);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
  border-color: var(--color-primary);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual .phone-mockup {
  position: relative;
  max-width: 280px;
  aspect-ratio: 9 / 19;
  background: linear-gradient(135deg, #717ce2 0%, #6f58a9 100%);
  border-radius: 2rem;
  border: 3px solid var(--color-border-strong);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
}

.hero-visual .phone-mockup img,
.hero-visual .phone-mockup .hero-app-img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* Subtle glow behind phone */
.hero-visual .phone-mockup::before {
  content: '';
  position: absolute;
  inset: -30px;
  background: radial-gradient(circle, rgba(61, 90, 254, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

/* ─── Features grid ─────────────────────────────────────────────────────── */
.features {
  background: var(--color-surface);
}

.features-intro {
  text-align: center;
  max-width: 36em;
  margin: 0 auto 3rem;
}

.features-intro h2 {
  color: var(--color-heading);
  margin-bottom: 0.75rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 90, 254, 0.25);
  box-shadow: var(--shadow-hover);
}

.feature-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  color: var(--color-heading);
  margin-bottom: 0.5rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.95rem;
}

/* Feature icon gradients (match app) */
.feat-gst { background: linear-gradient(135deg, #1976d2, #42a5f5); }
.feat-margin { background: linear-gradient(135deg, #1976d2, #42a5f5); }
.feat-cashbook { background: linear-gradient(135deg, #7b1fa2, #ba68c8); }
.feat-emi { background: linear-gradient(135deg, #5e35b1, #9575cd); }
.feat-invest { background: linear-gradient(135deg, #283593, #5c6bc0); }
.feat-unit { background: linear-gradient(135deg, #e64a19, #ff7043); }
.feat-note { background: linear-gradient(135deg, #00897b, #26a69a); }

/* ─── Investment section (deep dive) ──────────────────────────────────────── */
.investment {
  background: var(--color-bg);
}

.investment-layout {
  display: grid;
  gap: 2rem;
  margin-top: 1rem;
}

@media (min-width: 800px) {
  .investment-layout {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
  }
}

.investment-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.investment-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.investment-list li:last-child { border-bottom: none; }

.investment-list .icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.smart-tools-box {
  background: linear-gradient(145deg, var(--color-surface) 0%, var(--color-surface-2) 100%);
  border: 1px solid rgba(124, 77, 255, 0.2);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.smart-tools-box h4 {
  color: var(--color-heading);
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.smart-tools-box ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ─── Highlights / Why CalcFin ────────────────────────────────────────────── */
.highlights {
  background: var(--color-surface);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.highlight-item {
  text-align: center;
  padding: 1.5rem 1rem;
}

.highlight-item .icon-wrap {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.highlight-item h3 {
  color: var(--color-heading);
  margin-bottom: 0.5rem;
}

.highlight-item p {
  margin: 0;
  font-size: 0.9rem;
}

/* ─── CTA ─────────────────────────────────────────────────────────────────── */
.cta {
  padding: 5rem 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface-2) 100%);
}

.cta-box {
  max-width: 32em;
  margin: 0 auto;
}

.cta h2 {
  color: var(--color-heading);
  margin-bottom: 0.75rem;
}

.cta p {
  margin-bottom: 1.5rem;
}

.cta .btn {
  font-size: 1.1rem;
  padding: 1rem 2rem;
}

/* ─── Footer ───────────────────────────────────────────────────────────────── */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  text-align: center;
}

.footer-logos {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer-logo-img {
  height: 56px;
  width: auto;
  max-width: 56px;
  object-fit: contain;
  display: block;
}

.footer-sublogo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-sublogo-by {
  text-transform: lowercase;
  font-weight: 500;
}

.footer-sublogo-img {
  object-fit: contain;
  display: block;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-primary-light);
}

.copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
  opacity: 0.8;
}

/* ─── Nav (sticky) ─────────────────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0.75rem 0;
  background: rgba(248, 249, 252, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: padding var(--transition);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav .logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-heading);
}

.site-nav .logo-img {
  height: 40px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
}

.site-nav .logo-by {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: lowercase;
}

.site-nav .sublogo-img {
  max-width: 80px;
  object-fit: contain;
  display: block;
}

.site-nav .nav-links {
  display: flex;
  gap: 1.5rem;
}

.site-nav .nav-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav .nav-links a:hover {
  color: var(--color-primary);
}

/* Responsive */
@media (max-width: 600px) {
  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .site-nav .nav-links {
    display: none;
  }
}