/* ============================================================
   DESIGN SYSTEM — Farzin Firouzi Personal Website
   Light theme: matches Adam McDaniel's teal/blue palette
   Dark theme: equivalent dark variant via prefers-color-scheme
   ============================================================ */

/* ---------- CSS Custom Properties (Light — default) ---------- */
:root {
  /* Colors */
  --color-primary: #0290aa;
  --color-secondary: #00a0fd;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f9fc;
  --color-heading: #272341;
  --color-text: #333333;
  --color-text-muted: #555555;
  --color-card-bg: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.1);
  --color-border: #e0e0e0;
  --color-footer-bg: #333333;
  --color-footer-text: #cccccc;
  --color-hero-bg: #ffffff;
  --color-hero-glow: rgba(2, 144, 170, 0.06);
  --color-contact-bg: linear-gradient(135deg, #0290aa 0%, #00a0fd 100%);
  --color-contact-text: #ffffff;
  --color-btn-outline: var(--color-primary);
  --color-btn-text: var(--color-primary);
  --color-btn-hover-bg: var(--color-primary);
  --color-btn-hover-text: #ffffff;

  /* Typography */
  --font-family: 'Montserrat', sans-serif;
  --font-size-base: 1.6rem;
  --font-size-sm: 1.4rem;
  --font-size-lg: 2rem;
  --font-size-xl: 2.8rem;
  --font-size-hero: 4.4rem;
  --font-size-section-title: 3.2rem;
  --font-weight-normal: 400;
  --font-weight-bold: 700;

  /* Spacing */
  --section-padding: 10rem 0;
  --container-max: 1140px;
  --container-padding: 0 2.4rem;

  /* Transitions */
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---------- Dark Theme ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #11b3cf;
    --color-secondary: #3db8ff;
    --color-bg: #0f0f1a;
    --color-bg-alt: #161625;
    --color-heading: #e8e8f0;
    --color-text: #c8c8d4;
    --color-text-muted: #9090a4;
    --color-card-bg: #1c1c2e;
    --color-card-shadow: rgba(0, 0, 0, 0.4);
    --color-border: #2a2a40;
    --color-footer-bg: #0a0a14;
    --color-footer-text: #888899;
    --color-hero-bg: #0f0f1a;
    --color-hero-glow: rgba(17, 179, 207, 0.06);
    --color-contact-bg: linear-gradient(135deg, #0b6e82 0%, #0074b8 100%);
    --color-contact-text: #e8e8f0;
    --color-btn-outline: var(--color-primary);
    --color-btn-text: var(--color-primary);
    --color-btn-hover-bg: var(--color-primary);
    --color-btn-hover-text: #0f0f1a;
  }
}

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

html {
  font-size: 62.5%;
  /* 1rem = 10px */
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  text-align: center;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ---------- Container ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
  width: 100%;
}

/* ---------- Section Title ---------- */
.section-title {
  font-size: var(--font-size-section-title);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  margin-bottom: 6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  padding: 1rem 3.2rem;
  border: 2px solid var(--color-btn-outline);
  border-radius: 0;
  color: var(--color-btn-text);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    background var(--transition-speed) var(--transition-ease),
    color var(--transition-speed) var(--transition-ease),
    transform var(--transition-speed) var(--transition-ease);
}

.btn:hover {
  background: var(--color-btn-hover-bg);
  color: var(--color-btn-hover-text);
  transform: translateY(-2px);
}

.btn+.btn {
  margin-left: 1.6rem;
}

/* ---------- Scroll-Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity 0.8s var(--transition-ease),
    transform 0.8s var(--transition-ease);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-60px) scale(0.97);
  filter: blur(2px);
  transition:
    opacity 1s var(--transition-ease),
    transform 1s var(--transition-ease),
    filter 1s var(--transition-ease);
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0) scale(1);
  filter: blur(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px) scale(0.97);
  filter: blur(2px);
  transition:
    opacity 1s var(--transition-ease),
    transform 1s var(--transition-ease),
    filter 1s var(--transition-ease);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0) scale(1);
  filter: blur(0);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  background: var(--color-hero-bg);
  background-image:
    radial-gradient(ellipse at 20% 50%, var(--color-hero-glow) 0%, transparent 70%);
  padding: 0 5.6rem;
  text-align: left;
}

.hero-content {
  max-width: 90rem;
}

.hero-title {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  line-height: 1.2;
  margin-bottom: 3.2rem;
}

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

.hero-title-line {
  white-space: nowrap;
}

.hero-wave {
  display: inline;
  width: 0.9em;
  height: 0.9em;
  vertical-align: baseline;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.hero-cta {
  margin-top: 3.2rem;
}

.hero-cta .btn {
  font-size: 2.2rem;
  padding: 1.2rem 4rem;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
#about {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.about-wrapper {
  display: flex;
  align-items: center;
  gap: 6rem;
  text-align: left;
}

.about-photo-col {
  flex: 0 0 auto;
  width: 30rem;
}

.about-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 8px 30px var(--color-card-shadow);
  border: 4px solid var(--color-primary);
}

.about-info {
  flex: 1;
}

.about-text {
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: 1.6rem;
  line-height: 1.8;
  list-style: none;
}

.about-text li {
  padding-left: 1.8rem;
  position: relative;
}

.about-text li::before {
  content: "✓ ";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.about-buttons {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

/* ============================================================
   SERVICES SECTION
   ============================================================ */
#services {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.services-grid {
  display: flex;
  flex-direction: column;
  gap: 8rem;
}

.service-card {
  display: flex;
  align-items: center;
  gap: 5rem;
  text-align: left;
}

.service-card:nth-child(even) {
  flex-direction: row-reverse;
}

.service-card-image {
  flex: 0 0 45%;
  max-width: 45%;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 6px 24px var(--color-card-shadow);
  transition: transform var(--transition-speed) var(--transition-ease);
}

.service-card-image:hover {
  transform: scale(1.02);
}

.service-card-image img {
  width: 100%;
  display: block;
}

.service-card-info {
  flex: 1;
}

.service-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  margin-bottom: 1.2rem;
}

.title-icon {
  display: inline;
  width: 0.9em;
  height: 0.9em;
  vertical-align: baseline;
}

.service-card-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.service-card-detail {
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: 1.2rem;
  line-height: 1.8;
  list-style: none;
}

.service-card-detail li {
  padding-left: 1.8rem;
  position: relative;
}

.service-card-detail li::before {
  content: "✓ ";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.service-card-learn {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-heading);
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.service-card-topics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 2rem;
  list-style: none;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin-bottom: 2rem;
}

.service-card-topics li::before {
  content: "✓ ";
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
#contact {
  padding: 6rem 0;
  background: var(--color-contact-bg);
  color: var(--color-contact-text);
}

#contact .section-title {
  color: var(--color-contact-text);
  margin-bottom: 1.6rem;
}

.contact-cta-text {
  font-size: var(--font-size-lg);
  margin-bottom: 3rem;
  opacity: 0.9;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 1.6rem;
  flex-wrap: wrap;
}

#contact .btn {
  border-color: var(--color-contact-text);
  color: var(--color-contact-text);
}

#contact .btn:hover {
  background: var(--color-contact-text);
  color: var(--color-primary);
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  padding: 3rem 0;
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  font-size: var(--font-size-sm);
}

footer a {
  color: var(--color-footer-text);
  transition: color var(--transition-speed) var(--transition-ease);
}

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

.footer-content {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet landscape */
@media (max-width: 1024px) {
  :root {
    --font-size-hero: 4.4rem;
  }
}

/* Tablet portrait */
@media (max-width: 768px) {
  :root {
    --font-size-hero: 3.6rem;
    --font-size-section-title: 2.6rem;
    --section-padding: 7rem 0;
  }

  #hero {
    padding: 0 2.4rem;
    justify-content: center;
    text-align: center;
  }

  .hero-title-line {
    white-space: normal;
  }

  .hero-cta {
    display: flex;
    justify-content: center;
  }

  /* About */
  .about-wrapper {
    flex-direction: column;
    text-align: center;
  }

  .about-photo-col {
    width: 22rem;
    margin: 0 auto;
  }

  .about-info {
    width: 100%;
  }

  .about-buttons {
    justify-content: center;
  }

  /* Services */
  .service-card,
  .service-card:nth-child(even) {
    flex-direction: column;
  }

  .service-card-image {
    flex: none;
    max-width: 100%;
    width: 100%;
  }

  .service-card-info {
    text-align: center;
  }

  /* Contact */
  .contact-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn+.btn {
    margin-left: 0;
  }
}

/* Phone */
@media (max-width: 480px) {
  :root {
    --font-size-hero: 3rem;
    --font-size-xl: 2.2rem;
    --font-size-section-title: 2.2rem;
  }

  #hero {
    padding: 0 1.6rem;
  }

  .hero-cta .btn {
    font-size: 1.8rem;
    padding: 1rem 3rem;
  }

  .about-photo-col {
    width: 18rem;
  }
}

/* ============================================================
   PRICING PAGE
   ============================================================ */

/* Header */
#pricing-header {
  padding: 6rem 0 2rem;
  background: var(--color-bg-alt);
  text-align: center;
}

#pricing-header .section-title {
  margin-bottom: 1.6rem;
}

.pricing-intro {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  max-width: 70rem;
  margin: 0 auto 3rem;
  line-height: 1.8;
}

.pricing-back {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: 3.2rem;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.pricing-back:hover {
  transform: translateX(-4px);
}

.pricing-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 50rem;
  margin: 0 auto;
}

/* Booking Section (integrated into home page) */
#booking {
  padding: 5rem 0 6rem;
  background: var(--color-bg-alt);
}

#booking .section-title {
  margin-bottom: 1.6rem;
}

/* Pricing Section (standalone page) */
#pricing {
  padding: 5rem 0 6rem;
  background: var(--color-bg);
}

/* Horizontal options row */
.pricing-options {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 0;
  max-width: 80rem;
  margin: 0 auto 3rem;
}

.pricing-option {
  flex: 1;
  text-align: center;
  padding: 2rem 3rem;
}

.pricing-option-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  margin-bottom: 0.8rem;
}

.pricing-option-price {
  font-size: 4.8rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 1rem;
}

.pricing-option-detail {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Vertical divider between options */
.pricing-option-divider {
  width: 1px;
  align-self: stretch;
  background: var(--color-border);
}

/* Book button */
.pricing-book {
  text-align: center;
  margin-top: 0;
}

.pricing-book-btn {
  font-size: var(--font-size-base);
  padding: 1.4rem 4rem;
}

/* Questions section */
#pricing-questions {
  padding: var(--section-padding);
  background: var(--color-contact-bg);
  color: var(--color-contact-text);
}

#pricing-questions .section-title {
  color: var(--color-contact-text);
}

.pricing-questions-text {
  font-size: var(--font-size-lg);
  margin-bottom: 3.2rem;
  opacity: 0.9;
}

#pricing-questions .btn {
  border-color: var(--color-contact-text);
  color: var(--color-contact-text);
}

#pricing-questions .btn:hover {
  background: var(--color-contact-text);
  color: var(--color-primary);
}

/* ---------- Pricing Responsive ---------- */
@media (max-width: 768px) {
  .pricing-options {
    flex-direction: column;
    align-items: center;
  }

  .pricing-option-divider {
    width: 60%;
    height: 1px;
    align-self: center;
  }
}

@media (max-width: 480px) {
  .pricing-option-price {
    font-size: 4rem;
  }
}