/* ============================================================
   TANG PACIFIC LLC — Design System
   Palette: Deep Navy + Warm Gold + White
   Mood: Authoritative, refined, maritime
   ============================================================ */

:root, [data-theme="light"] {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Palette — Light Mode (off-white ground, navy authority) */
  --color-bg:              #f5f4f0;
  --color-surface:         #faf9f7;
  --color-surface-2:       #ffffff;
  --color-surface-offset:  #ede9e1;
  --color-divider:         #ddd9d2;
  --color-border:          #ccc8c0;

  /* Text */
  --color-text:            #16202e;
  --color-text-muted:      #6b7280;
  --color-text-faint:      #b0aaa2;
  --color-text-inverse:    #f5f4f0;

  /* Primary — deep navy blue */
  --color-primary:         #0f2d4a;
  --color-primary-hover:   #0a2038;
  --color-primary-active:  #061525;

  /* Accent — warm gold */
  --color-accent:          #b5862c;
  --color-accent-hover:    #9a6f20;
  --color-accent-light:    #f7edd8;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 45, 74, 0.08);
  --shadow-md: 0 4px 16px rgba(15, 45, 74, 0.10);
  --shadow-lg: 0 12px 40px rgba(15, 45, 74, 0.14);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
}

[data-theme="dark"] {
  --color-bg:              #0d1b2a;
  --color-surface:         #112236;
  --color-surface-2:       #162a40;
  --color-surface-offset:  #0a1520;
  --color-divider:         #1e3248;
  --color-border:          #253d56;
  --color-text:            #e0ddd8;
  --color-text-muted:      #8a98a8;
  --color-text-faint:      #4a5a6a;
  --color-text-inverse:    #0d1b2a;
  --color-primary:         #4f9ed4;
  --color-primary-hover:   #6ab5e0;
  --color-primary-active:  #3585bc;
  --color-accent:          #d4a84b;
  --color-accent-hover:    #e8c06a;
  --color-accent-light:    #2a2018;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0d1b2a;
    --color-surface:         #112236;
    --color-surface-2:       #162a40;
    --color-surface-offset:  #0a1520;
    --color-divider:         #1e3248;
    --color-border:          #253d56;
    --color-text:            #e0ddd8;
    --color-text-muted:      #8a98a8;
    --color-text-faint:      #4a5a6a;
    --color-text-inverse:    #0d1b2a;
    --color-primary:         #4f9ed4;
    --color-primary-hover:   #6ab5e0;
    --color-primary-active:  #3585bc;
    --color-accent:          #d4a84b;
    --color-accent-hover:    #e8c06a;
    --color-accent-light:    #2a2018;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
  }
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}

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

/* ============================================================
   HEADER / NAV
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}

.site-header--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: var(--space-8);
}

/* SVG Logo */
.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.logo-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-wordmark__main {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.logo-wordmark__sub {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  text-decoration: none;
  padding-block: var(--space-2);
}

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

.nav-cta {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-text-inverse) !important;
  background: var(--color-primary);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--color-primary-hover) !important;
  color: var(--color-text-inverse) !important;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
  cursor: pointer;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
}

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

.mobile-nav a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

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

.mobile-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  min-height: 88vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

.hero__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(var(--space-16), 8vw, var(--space-32));
  padding-right: var(--space-12);
  position: relative;
  z-index: 2;
}

.hero__eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero__title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero__desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 52ch;
  margin-bottom: var(--space-10);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  border: none;
  cursor: pointer;
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.hero__visual {
  position: relative;
  overflow: hidden;
}

.hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, var(--color-bg) 0%, transparent 30%);
}

.hero__stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  display: block;
}

.hero__stat-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============================================================
   SECTION COMMON
   ============================================================ */

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section--alt {
  background: var(--color-surface);
}

.section--dark {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.15;
  margin-bottom: var(--space-5);
}

.section-lead {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 60ch;
  margin-bottom: var(--space-12);
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/5;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-image__badge {
  position: absolute;
  bottom: var(--space-6);
  left: var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.about-image__badge-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  display: block;
  line-height: 1;
}

.about-image__badge-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  opacity: 0.8;
  margin-top: var(--space-1);
}

.about-content .section-title {
  margin-bottom: var(--space-5);
}

.about-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-6);
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.about-tag {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: var(--color-accent-light);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
}

[data-theme="dark"] .about-tag {
  color: var(--color-accent);
}

/* ============================================================
   SERVICES
   ============================================================ */

.services-header {
  text-align: center;
  max-width: 60ch;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.services-header .section-lead {
  margin-inline: auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-interactive);
}

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

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 44px;
  height: 44px;
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-accent);
}

[data-theme="dark"] .service-icon {
  background: color-mix(in srgb, var(--color-accent) 15%, transparent);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-card p {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   EXPERTISE BANNER (dark section)
   ============================================================ */

.expertise-banner {
  background: var(--color-primary);
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
  position: relative;
  overflow: hidden;
}

.expertise-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.expertise-banner .container {
  position: relative;
  z-index: 1;
}

.expertise-banner .section-label {
  color: var(--color-accent);
}

.expertise-banner .section-title {
  color: #ffffff;
}

.expertise-banner .section-lead {
  color: rgba(255,255,255,0.75);
}

.expertise-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4) var(--space-12);
  margin-top: var(--space-10);
}

.expertise-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.85);
  line-height: 1.5;
}

.expertise-item::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 0.45em;
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

[data-theme="dark"] .contact-info__icon {
  background: color-mix(in srgb, var(--color-accent) 15%, transparent);
}

.contact-info__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-1);
}

.contact-info__value {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  font-weight: 500;
}

.contact-info__value a {
  color: inherit;
  text-decoration: none;
}

.contact-info__value a:hover {
  color: var(--color-accent);
}

/* Contact Form */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-field {
  margin-bottom: var(--space-5);
}

.form-field label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 15%, transparent);
}

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

.form-submit {
  width: 100%;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-8);
  color: var(--color-text-muted);
}

.form-success svg {
  margin-inline: auto;
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer-links a {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

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

.footer-attribution a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer-attribution a:hover {
  color: var(--color-text-muted);
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero__content {
    padding: var(--space-16) var(--space-6) var(--space-8);
    order: 2;
  }

  .hero__visual {
    order: 1;
    min-height: 45vh;
  }

  .hero__visual::after {
    background: linear-gradient(to bottom, transparent 60%, var(--color-bg));
  }

  .hero__stats {
    gap: var(--space-6);
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .expertise-list {
    grid-template-columns: 1fr;
  }

  .nav-links { display: none; }
  .nav-cta { display: none; }
  .mobile-menu-btn { display: flex; }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (min-width: 901px) and (max-width: 1100px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
   PENNANT LOGO OVERRIDE
   ============================================================ */
.logo-link--pennant {
  gap: 0;
  padding: 0;
}

.logo-link--pennant svg {
  display: block;
  height: 44px;
  width: auto;
}

@media (max-width: 900px) {
  .logo-link--pennant svg {
    height: 38px;
  }
}