/* ==========================================================================
   Sohaib Thiab — Personal Website
   Dark Theme Design inspired by herbig.co
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --color-bg:          #0a0a0b;
  --color-bg-elevated: #111113;
  --color-bg-card:     #16161a;
  --color-bg-hover:    #1c1c21;
  --color-surface:     #1e1e23;

  --color-border:      #2a2a30;
  --color-border-light:#222228;

  --color-text:        #e8e8ed;
  --color-text-secondary: #9a9aaa;
  --color-text-muted:  #6b6b7b;

  --color-accent:      #6c63ff;
  --color-accent-hover:#7b73ff;
  --color-accent-glow: rgba(108, 99, 255, 0.15);
  --color-accent-soft: rgba(108, 99, 255, 0.08);

  --color-white:       #ffffff;
  --color-success:     #34d399;

  /* Typography */
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

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

.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.hidden {
  display: none !important;
}


/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 0 30px var(--color-accent-glow);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-white);
}

.btn-full {
  width: 100%;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-lg) 0;
  transition: all var(--transition-base);
}

.nav.scrolled {
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-md) 0;
}

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

.nav-logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

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

.nav-menu a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 400;
  position: relative;
}

.nav-menu a:hover {
  color: var(--color-white);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-menu a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 500 !important;
}

.nav-cta::after {
  display: none !important;
}

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

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: var(--text-6xl);
  font-weight: 600;
  line-height: 1.1;
  color: var(--color-white);
  margin-bottom: var(--space-xl);
}

.hero-title-accent {
  display: block;
  background: linear-gradient(135deg, var(--color-accent) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: var(--space-2xl);
}

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

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

.hero-image-wrapper {
  position: relative;
  width: 380px;
  height: 460px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, var(--color-bg) 100%);
  pointer-events: none;
}

.hero-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.hero-scroll span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ---------- Trust Bar ---------- */
.trust-bar {
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.trust-bar-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.trust-bar-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3xl);
  flex-wrap: wrap;
}

.trust-logo {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-muted);
  opacity: 0.5;
  transition: opacity var(--transition-base);
  letter-spacing: -0.02em;
}

.trust-logo:hover {
  opacity: 0.8;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-lead {
  font-size: var(--text-xl);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.about-text p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.highlight-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.highlight-card:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.highlight-number {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.highlight-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---------- Services ---------- */
.services {
  background: var(--color-bg-elevated);
}

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

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.service-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.service-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.service-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  transition: gap var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.service-link:hover {
  color: var(--color-accent-hover);
}

/* ---------- Book ---------- */
.book-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-3xl);
  align-items: center;
}

.book-visual {
  display: flex;
  justify-content: center;
}

.book-mockup {
  perspective: 800px;
}

.book-cover {
  width: 260px;
  height: 370px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #4f46e5 40%, #312e81 100%);
  border-radius: var(--radius-sm);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  transform: rotateY(-8deg);
  box-shadow:
    10px 10px 30px rgba(0, 0, 0, 0.4),
    -2px 0 10px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-slow);
}

.book-cover:hover {
  transform: rotateY(0deg);
}

.book-cover::after {
  content: '';
  position: absolute;
  top: 0;
  left: 8px;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.1);
}

.book-cover-label {
  position: absolute;
  top: var(--space-xl);
  left: var(--space-xl);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.6);
}

.book-cover-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  color: var(--color-white);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.book-cover-author {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
}

.book-content .section-title {
  text-align: left;
}

.book-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.book-features {
  margin-bottom: var(--space-2xl);
}

.book-features li {
  position: relative;
  padding-left: var(--space-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.book-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* ---------- Courses ---------- */
.courses {
  background: var(--color-bg-elevated);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.course-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
}

.course-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
}

.course-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-success);
  background: rgba(52, 211, 153, 0.1);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: var(--space-lg);
}

.course-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.course-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.course-meta {
  display: flex;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---------- Testimonials ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.testimonial-card:hover {
  border-color: var(--color-border);
}

.testimonial-quote {
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.testimonial-text {
  color: var(--color-text-secondary);
  line-height: 1.8;
  font-size: var(--text-base);
  flex: 1;
  margin-bottom: var(--space-xl);
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
}

.testimonial-name {
  font-weight: 600;
  color: var(--color-white);
  font-size: var(--text-sm);
}

.testimonial-role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---------- Speaking Gallery ---------- */
.speaking-gallery {
  background: var(--color-bg-elevated);
}

.speaking-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.speaking-photo {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.speaking-photo-wide {
  grid-column: span 2;
}

.speaking-photo-tall {
  grid-row: span 2;
}

.speaking-photo-full {
  grid-column: 1 / -1;
  max-height: 400px;
}

.speaking-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.speaking-photo:hover img {
  transform: scale(1.03);
}

.speaking-photo-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.speaking-photo:hover .speaking-photo-caption {
  opacity: 1;
}

.speaking-cta {
  text-align: center;
  margin-top: var(--space-2xl);
}

/* ---------- Book Notify Form ---------- */
.book-notify-form {
  width: 100%;
  max-width: 440px;
}

.book-notify-input {
  display: flex;
  gap: var(--space-sm);
}

.book-notify-input input {
  flex: 1;
  padding: 0.8rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast);
}

.book-notify-input input:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

.book-notify-input .btn {
  white-space: nowrap;
  flex-shrink: 0;
}

/* ---------- MasteringProduct ---------- */
.mastering-product {
  background: var(--color-bg-elevated);
}

.mastering-product-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.mp-resources {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.mp-resource-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.mp-resource-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.mp-resource-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.mp-resource-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.mp-resource-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.mp-cta-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.mp-cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, var(--color-accent-glow) 0%, transparent 50%);
  pointer-events: none;
}

.mp-cta-content {
  position: relative;
}

.mp-cta-content h3 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.mp-cta-content p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 550px;
  margin: 0 auto var(--space-2xl);
}

.mp-cta-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-3xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.8rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236b6b7b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group select option {
  background: var(--color-bg-card);
  color: var(--color-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
}

.contact-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.contact-card p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
}

.social-link:hover {
  background: var(--color-bg-hover);
  color: var(--color-white);
}

.social-link svg {
  flex-shrink: 0;
}

.speaking-topics {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.speaking-topics li {
  position: relative;
  padding-left: var(--space-lg);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.speaking-topics li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-white);
  display: inline-block;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
  max-width: 280px;
}

.footer-links h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
}

/* ---------- Animations (Scroll Reveal) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: var(--text-5xl);
  }

  .hero-image-wrapper {
    width: 320px;
    height: 400px;
  }

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

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

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

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

  .speaking-photo-wide {
    grid-column: span 2;
  }

  .speaking-photo-tall {
    grid-row: span 1;
  }

  .speaking-photo-full {
    grid-column: 1 / -1;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer-grid > :last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --text-6xl: 2.5rem;
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  /* Nav mobile */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg-elevated);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: var(--space-3xl);
    gap: var(--space-lg);
    transition: right var(--transition-slow);
    border-left: 1px solid var(--color-border-light);
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-menu a {
    font-size: var(--text-lg);
  }

  /* Hero mobile */
  .hero {
    min-height: auto;
    padding-top: calc(80px + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

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

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

  .hero-image {
    order: -1;
  }

  .hero-image-wrapper {
    width: 240px;
    height: 300px;
  }

  .hero-scroll {
    display: none;
  }

  /* Trust bar */
  .trust-bar-logos {
    gap: var(--space-xl);
  }

  .trust-logo {
    font-size: var(--text-sm);
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .about-highlights {
    grid-template-columns: 1fr 1fr;
  }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Book */
  .book-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

  .book-content .section-title {
    text-align: center;
  }

  .book-content .section-label {
    text-align: center;
  }

  .book-features {
    text-align: left;
  }

  .book-cover {
    width: 220px;
    height: 310px;
    transform: rotateY(0);
  }

  /* Courses */
  .courses-grid {
    grid-template-columns: 1fr;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  /* Speaking Gallery */
  .speaking-gallery-grid {
    grid-template-columns: 1fr;
  }

  .speaking-photo-wide,
  .speaking-photo-full {
    grid-column: span 1;
  }

  .speaking-photo-tall {
    grid-row: span 1;
  }

  .speaking-photo-full {
    max-height: 280px;
  }

  /* Book notify */
  .book-notify-input {
    flex-direction: column;
  }

  .book-notify-form {
    max-width: 100%;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  /* MasteringProduct */
  .mp-resources {
    grid-template-columns: 1fr;
  }

  .mp-cta-card {
    padding: var(--space-2xl);
  }

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

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .about-highlights {
    grid-template-columns: 1fr;
  }

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

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