/* ============================================================
   Zakestidis Customs Services — Stylesheet
   Palette: Navy + warm gold accent
   ============================================================ */

:root {
  /* 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);

  /* 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;

  /* Colors — LIGHT (default) */
  --color-bg: #FAF8F3;
  --color-surface: #FFFFFF;
  --color-surface-2: #F4F1E9;
  --color-surface-3: #ECE7DB;
  --color-border: #D9D2C0;
  --color-divider: #E5DFD0;

  --color-text: #1A2238;
  --color-text-muted: #5C6276;
  --color-text-faint: #9BA0B0;
  --color-text-inverse: #FAF8F3;

  /* Primary — Deep navy (maritime/trade/trust) */
  --color-primary: #1A2238;
  --color-primary-hover: #0F1729;
  --color-primary-soft: #E4E6EC;

  /* Accent — Warm gold (premium/warm/welcoming) */
  --color-accent: #C29A3A;
  --color-accent-hover: #A8841E;
  --color-accent-soft: #F6EBD0;

  /* Semantic */
  --color-success: #437A22;
  --color-error: #A12C7B;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 34, 56, 0.05);
  --shadow-md: 0 4px 16px rgba(26, 34, 56, 0.08);
  --shadow-lg: 0 16px 40px rgba(26, 34, 56, 0.10);

  /* Widths */
  --content-narrow: 720px;
  --content-default: 1080px;
  --content-wide: 1280px;

  /* Fonts */
  --font-display: 'Instrument Serif', 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Work Sans', 'Inter', system-ui, sans-serif;

  /* Transitions */
  --t-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='dark'] {
  --color-bg: #0E1320;
  --color-surface: #161C2D;
  --color-surface-2: #1B2235;
  --color-surface-3: #232A40;
  --color-border: #2E3550;
  --color-divider: #232A40;

  --color-text: #ECE7D9;
  --color-text-muted: #98A0B5;
  --color-text-faint: #5A6175;
  --color-text-inverse: #0E1320;

  --color-primary: #DCD3BB;
  --color-primary-hover: #FFFFFF;
  --color-primary-soft: #232A40;

  --color-accent: #E0B45A;
  --color-accent-hover: #F4CB72;
  --color-accent-soft: #2A2415;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
}

/* ===== RESET / BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
}

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

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
  max-width: 65ch;
}

::selection {
  background: var(--color-accent);
  color: var(--color-primary);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

a, button, input, textarea, select {
  transition: color var(--t-interactive),
              background var(--t-interactive),
              border-color var(--t-interactive),
              transform var(--t-interactive),
              box-shadow var(--t-interactive);
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

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

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

section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-interactive), background var(--t-interactive);
}

.site-header.scrolled {
  border-bottom-color: var(--color-divider);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}

.logo__mark {
  width: 38px;
  height: 38px;
  color: var(--color-accent);
}

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

.logo__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.logo__sub {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__list {
  display: flex;
  gap: var(--space-6);
}

.nav__link {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  position: relative;
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--t-interactive);
}

.nav__link:hover::after {
  width: 100%;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

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

@media (max-width: 880px) {
  .nav__list {
    position: fixed;
    inset: 70px 0 auto;
    flex-direction: column;
    background: var(--color-surface);
    padding: var(--space-8);
    border-bottom: 1px solid var(--color-divider);
    transform: translateY(-110%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-md);
  }
  .nav.open .nav__list { transform: translateY(0); }
  .nav__link { font-size: var(--text-base); }
  .mobile-toggle { display: inline-flex; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
}

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

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

.btn--ghost {
  color: var(--color-text);
  border-color: var(--color-border);
  background: transparent;
}

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

.btn--accent {
  background: var(--color-accent);
  color: #FFFFFF;
}

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

/* ===== HERO ===== */
.hero {
  position: relative;
  padding-block: clamp(var(--space-16), 12vw, var(--space-32));
  overflow: hidden;
}

.hero__decoration {
  position: absolute;
  top: 50%;
  right: -10%;
  transform: translateY(-50%);
  width: clamp(400px, 50vw, 800px);
  opacity: 0.06;
  color: var(--color-primary);
  pointer-events: none;
  z-index: 0;
}

[data-theme='dark'] .hero__decoration {
  opacity: 0.12;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-8);
  max-width: 900px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

.eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--color-accent);
}

.hero__title {
  font-size: clamp(2.25rem, 1rem + 4vw, 4.5rem);
  font-weight: 400;
  line-height: 1.08;
  color: var(--color-text);
  max-width: 22ch;
}

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

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.5;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  max-width: 700px;
}

.stat__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

/* ===== SECTION TITLES ===== */
.section-head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-16);
  max-width: 720px;
}

.section-head__title {
  font-size: var(--text-2xl);
  color: var(--color-text);
}

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

.section-head__lead {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

/* ===== SERVICES ===== */
.services {
  background: var(--color-surface-2);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  overflow: hidden;
  transition: transform var(--t-interactive), box-shadow var(--t-interactive), border-color var(--t-interactive);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.service-card__code {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.service-card__icon {
  width: 44px;
  height: 44px;
  color: var(--color-primary);
}

[data-theme='dark'] .service-card__icon {
  color: var(--color-accent);
}

.service-card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-text);
}

.service-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== APPROACH ===== */
.approach__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-8);
  counter-reset: step;
}

.approach-step {
  position: relative;
  padding-top: var(--space-12);
}

.approach-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--color-accent);
  opacity: 0.4;
  line-height: 1;
}

.approach-step__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.approach-step__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ===== ABOUT / VALUES ===== */
.about {
  background: var(--color-surface-2);
}

.about__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-12), 8vw, var(--space-20));
  align-items: start;
}

@media (max-width: 880px) {
  .about__layout { grid-template-columns: 1fr; }
}

.about__intro p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.about__intro p strong {
  color: var(--color-text);
  font-weight: 500;
}

.values {
  display: grid;
  gap: var(--space-6);
}

.value {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  align-items: start;
}

.value__icon {
  width: 44px;
  height: 44px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.value__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  grid-column: 2;
}

.value__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  grid-column: 2;
}

/* ===== CONTACT ===== */
.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
  align-items: start;
}

@media (max-width: 880px) {
  .contact__layout { grid-template-columns: 1fr; }
}

.contact-info {
  display: grid;
  gap: var(--space-6);
}

.contact-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-divider);
  align-items: start;
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-row__icon {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  margin-top: 4px;
}

.contact-row__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.contact-row__value {
  font-size: var(--text-base);
  color: var(--color-text);
}

.contact-row__value a {
  color: var(--color-text);
}

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

.contact-row__sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ===== FORM ===== */
.form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  display: grid;
  gap: var(--space-5);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

@media (max-width: 600px) {
  .form__row { grid-template-columns: 1fr; }
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.field input,
.field textarea,
.field select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  font-family: inherit;
  width: 100%;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-2);
  flex-wrap: wrap;
}

.form__note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.form__feedback {
  font-size: var(--text-sm);
  color: var(--color-success);
  display: none;
}

.form__feedback.active { display: block; }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding-block: var(--space-16) var(--space-8);
}

[data-theme='dark'] .site-footer {
  background: var(--color-surface);
  color: var(--color-text);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (max-width: 880px) {
  .site-footer__inner { grid-template-columns: 1fr; gap: var(--space-8); }
}

.site-footer .logo__name,
.site-footer .logo__sub {
  color: inherit;
}

.site-footer p {
  font-size: var(--text-sm);
  opacity: 0.8;
  margin-top: var(--space-4);
  max-width: 40ch;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

.footer-list {
  display: grid;
  gap: var(--space-2);
}

.footer-list a {
  color: inherit;
  opacity: 0.8;
  font-size: var(--text-sm);
}

.footer-list a:hover {
  opacity: 1;
  color: var(--color-accent);
}

.site-footer__bottom {
  border-top: 1px solid color-mix(in srgb, var(--color-text-inverse) 15%, transparent);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  opacity: 0.7;
}

[data-theme='dark'] .site-footer__bottom {
  border-top-color: var(--color-divider);
}

/* ===== ANIMATIONS ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ===== UTILITIES ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}