/* ============================================
   Tulsi Chokshi — Personal Site
   ForwardLens Dark Theme (slate + green accent)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* ForwardLens-inspired palette */
  --color-bg: #0f172a;
  --color-bg-lighter: #1e293b;
  --color-bg-card: #162032;
  --color-surface: #1e293b;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-accent: #22c55e;
  --color-accent-dark: #16a34a;
  --color-accent-glow: rgba(34, 197, 94, 0.25);
  --color-accent-subtle: rgba(34, 197, 94, 0.1);
  --color-border: #334155;
  --color-border-light: #1e293b;
  --color-highlight: #facc15;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --container-max: 1200px;
  --container-narrow: 780px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 8rem;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(34, 197, 94, 0.15);
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-accent-dark);
}

img {
  max-width: 100%;
  display: block;
}

/* --- Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

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

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

.nav-cta {
  background: var(--color-accent);
  color: var(--color-bg) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 100px;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--color-accent-dark) !important;
  color: white !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: var(--space-sm) var(--space-md) var(--space-md);
  gap: var(--space-sm);
  background: rgba(15, 23, 42, 0.95);
}

.nav-mobile a {
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: 500;
  padding: var(--space-xs) 0;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 100px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

/* --- Section Labels --- */
.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  padding-top: calc(64px + var(--space-xl));
  padding-bottom: var(--space-xl);
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--color-accent-glow), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  letter-spacing: 0.04em;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.hero-highlight {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero-photo {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1/1;
  object-fit: cover;
  border-radius: 50%;
  margin-left: auto;
  border: 4px solid var(--color-border);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* ============================================
   Story
   ============================================ */
.story {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-lighter);
}

.story-block {
  margin-bottom: var(--space-lg);
}

.story-lead {
  font-size: 1.3rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.story-block p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.story-heading {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.story-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ============================================
   Credentials
   ============================================ */
.credentials {
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
}

.cred-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.cred-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: all var(--transition);
}

.cred-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.cred-icon {
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.cred-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.cred-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.cred-languages {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.cred-lang-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cred-lang {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  background: var(--color-accent-subtle);
  padding: 0.3rem 0.85rem;
  border-radius: 100px;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.cred-lang-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ============================================
   ForwardLens
   ============================================ */
.forwardlens {
  position: relative;
  padding: var(--space-2xl) 0;
  background: var(--color-bg-lighter);
  overflow: hidden;
}

.forwardlens-glow {
  position: absolute;
  top: 50%;
  left: -200px;
  transform: translateY(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-glow), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.forwardlens .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.forwardlens .section-label {
  color: var(--color-highlight);
}

.forwardlens .section-title {
  color: var(--color-text);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
}

.fl-tagline {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.fl-principles {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.fl-principle h4 {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.fl-principle p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.fl-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.fl-card-question {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-text);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.fl-card-answer {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.fl-card-answer strong {
  color: var(--color-accent);
}

.fl-card-rec {
  display: inline-block;
  color: var(--color-highlight);
  font-weight: 500;
  font-size: 0.9rem;
}

/* ============================================
   Insights
   ============================================ */
.insights {
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
}

.insights-intro {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: var(--space-xl);
  margin-top: calc(var(--space-lg) * -1 + var(--space-sm));
  line-height: 1.7;
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.insight-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.insight-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.insight-featured {
  grid-column: 1 / -1;
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(250, 204, 21, 0.05));
  border-color: rgba(34, 197, 94, 0.2);
}

.insight-featured h3 {
  font-size: 1.5rem;
}

.insight-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  margin-bottom: var(--space-sm);
  align-self: flex-start;
}

.insight-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.insight-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
}

.insight-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ============================================
   Newsletter
   ============================================ */
.newsletter {
  padding: var(--space-xl) 0;
  background: var(--color-bg-lighter);
  text-align: center;
}

.newsletter-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.newsletter-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 480px;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: 100px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  outline: none;
  transition: border-color var(--transition);
}

.newsletter-input:focus {
  border-color: var(--color-accent);
}

.newsletter-input::placeholder {
  color: var(--color-text-muted);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--space-xl) 0 var(--space-md);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.footer-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.footer-text {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
  max-width: 480px;
}

.footer-email {
  display: inline-block;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.footer-email:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

.footer-links h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: var(--space-md);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-photo {
    max-width: 240px;
    margin: 0 auto;
  }

  .hero {
    min-height: auto;
    padding-top: calc(64px + var(--space-lg));
    padding-bottom: var(--space-lg);
  }

  .cred-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .forwardlens .container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .insights-grid {
    grid-template-columns: 1fr;
  }

  .insight-featured {
    grid-column: 1;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 640px) {
  :root {
    --space-lg: 3rem;
    --space-xl: 4rem;
    --space-2xl: 5rem;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-mobile.open {
    display: flex;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    text-align: center;
    width: 100%;
    max-width: 280px;
  }

  .story-stats {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    text-align: center;
  }

  .cred-grid {
    grid-template-columns: 1fr;
  }

  .cred-languages {
    justify-content: center;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form .btn {
    width: 100%;
  }

  .footer-title {
    font-size: 2rem;
  }
}