/* ===== DESIGN TOKENS ===== */
: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;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

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

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

/* ===== LIGHT MODE (default) ===== */
:root, [data-theme="light"] {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-surface-2: #f5f3f0;
  --color-surface-offset: #f0edea;
  --color-surface-accent: #fef3f2;
  --color-divider: #e5e2de;
  --color-border: #d9d5d0;

  --color-text: #1a1714;
  --color-text-muted: #6b665f;
  --color-text-faint: #a8a39c;
  --color-text-inverse: #faf9f7;

  --color-primary: #c62828;
  --color-primary-hover: #a01e1e;
  --color-primary-active: #7a1717;
  --color-primary-light: #fce8e6;

  --color-accent: #e8a838;
  --color-accent-hover: #d49530;

  --shadow-sm: 0 1px 3px rgba(26, 23, 20, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 23, 20, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 23, 20, 0.12);
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --color-bg: #141210;
  --color-surface: #1c1a17;
  --color-surface-2: #232019;
  --color-surface-offset: #1e1c18;
  --color-surface-accent: #2a1a1a;
  --color-divider: #2d2a26;
  --color-border: #3a3632;

  --color-text: #e5e2de;
  --color-text-muted: #8a857e;
  --color-text-faint: #5a5650;
  --color-text-inverse: #141210;

  --color-primary: #ef5350;
  --color-primary-hover: #f44336;
  --color-primary-active: #e53935;
  --color-primary-light: #2a1a1a;

  --color-accent: #f0b84a;
  --color-accent-hover: #e8a838;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141210;
    --color-surface: #1c1a17;
    --color-surface-2: #232019;
    --color-surface-offset: #1e1c18;
    --color-surface-accent: #2a1a1a;
    --color-divider: #2d2a26;
    --color-border: #3a3632;
    --color-text: #e5e2de;
    --color-text-muted: #8a857e;
    --color-text-faint: #5a5650;
    --color-text-inverse: #141210;
    --color-primary: #ef5350;
    --color-primary-hover: #f44336;
    --color-primary-active: #e53935;
    --color-primary-light: #2a1a1a;
    --color-accent: #f0b84a;
    --color-accent-hover: #e8a838;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  }
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo-icon {
  width: 32px;
  height: 32px;
}

.header__logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.header__logo-text span {
  color: var(--color-text-muted);
  font-weight: 400;
  margin-left: var(--space-2);
}

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

.header__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

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

/* ===== HERO ===== */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: var(--space-8);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), background var(--transition-interactive);
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hero__cta:active {
  transform: translateY(0);
}

.hero__cta svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-interactive);
}

.hero__cta:hover svg {
  transform: translateX(3px);
}

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__visual-circle {
  width: clamp(300px, 30vw, 480px);
  height: clamp(300px, 30vw, 480px);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface-2));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero__visual-inner {
  width: 80%;
  height: 80%;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.hero__visual-icon {
  width: 40%;
  height: 40%;
}

/* Floating pills */
.hero__pill {
  position: absolute;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  color: var(--color-text);
  white-space: nowrap;
}

.hero__pill--1 { top: 10%; right: -5%; animation: float 4s ease-in-out infinite; }
.hero__pill--2 { bottom: 15%; left: -5%; animation: float 5s ease-in-out infinite 0.5s; }
.hero__pill--3 { top: 50%; right: -15%; animation: float 4.5s ease-in-out infinite 1s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===== SECTION TITLES ===== */
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: var(--space-12);
}

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

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.about__text h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-divider);
}

.stat-card__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.stat-card__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ===== DIRECTIONS ===== */
.directions__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

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

.direction-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.direction-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.direction-card__icon svg {
  width: 24px;
  height: 24px;
}

.direction-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

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

/* ===== TECH STACK ===== */
.stack {
  background: var(--color-surface-2);
}

.stack__grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.stack__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
}

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

/* ===== BENEFITS ===== */
.benefits__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.benefit-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-divider);
}

.benefit-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  font-size: 1.5rem;
}

.benefit-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

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

/* ===== TABS ===== */
.tabs {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-10);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tabs__btn {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

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

.tabs__btn--active {
  background: var(--color-text);
  color: var(--color-text-inverse);
}

.tabs__btn--active:hover {
  color: var(--color-text-inverse);
}

.interview__panel,
.prep__panel {
  display: none;
}

.interview__panel--active,
.interview__panel[hidden="false"],
.prep__panel--active,
.prep__panel[hidden="false"] {
  display: block;
}

/* Override hidden attr for active panels */
.interview__panel:not([hidden]),
.prep__panel:not([hidden]) {
  display: block;
}

/* ===== INTERVIEW STEP TAGS ===== */
.interview__step-tags {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

.interview__step-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

/* ===== INTERVIEW STAGES ===== */
.interview {
  background: var(--color-surface-2);
}

.interview__timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.interview__timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-divider);
}

.interview__step {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
  position: relative;
}

.interview__step:last-child {
  margin-bottom: 0;
}

.interview__step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--color-primary);
  flex-shrink: 0;
  z-index: 1;
  transition: background var(--transition-interactive), border-color var(--transition-interactive), color var(--transition-interactive);
}

.interview__step:hover .interview__step-number {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.interview__step-content {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  border: 1px solid var(--color-divider);
  flex: 1;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.interview__step:hover .interview__step-content {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.interview__step-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

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

.interview__step-time {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
}

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

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

.prep__card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-divider);
}

.prep__card-icon {
  font-size: 1.75rem;
  margin-bottom: var(--space-4);
}

.prep__card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.prep__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.prep__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  padding-left: var(--space-5);
  position: relative;
}

.prep__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.5;
}

/* ===== VACANCIES ===== */
.vacancies__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.vacancy-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

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

.vacancy-card:active {
  transform: translateY(0);
}

.vacancy-card__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.vacancy-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}

.vacancy-card__meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.vacancy-card__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.vacancy-card__arrow {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}

.vacancy-card:hover .vacancy-card__arrow {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ===== CTA SECTION ===== */
.cta-section {
  background: var(--color-text);
  color: var(--color-text-inverse);
  text-align: center;
}

.cta-section .section-title {
  color: var(--color-text-inverse);
}

.cta-section .section-subtitle {
  color: var(--color-text-faint);
  margin-inline: auto;
}

[data-theme="dark"] .cta-section .section-subtitle {
  color: var(--color-text-faint);
}

.cta-section__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-4) var(--space-10);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), background var(--transition-interactive);
}

.cta-section__btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(198, 40, 40, 0.3);
}

.cta-section__btn:active {
  transform: translateY(0);
}

/* ===== FOOTER ===== */
.footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

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

.footer__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* ===== DARK MODE FIXES ===== */
[data-theme="dark"] .benefit-card__icon {
  filter: brightness(0.6) saturate(0.8);
}

[data-theme="dark"] .cta-section {
  background: var(--color-surface);
}

[data-theme="dark"] .cta-section .section-title {
  color: var(--color-text);
}

[data-theme="dark"] .cta-section__btn:hover {
  box-shadow: 0 8px 24px rgba(239, 83, 80, 0.3);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__subtitle {
    margin-inline: auto;
  }

  .hero__visual {
    order: -1;
  }

  .hero__visual-circle {
    width: clamp(220px, 60vw, 350px);
    height: clamp(220px, 60vw, 350px);
  }

  .hero__pill { display: none; }

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

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

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

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

  .tabs {
    border-radius: var(--radius-lg);
  }

  .vacancy-card {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .vacancy-card__arrow {
    align-self: flex-end;
  }

  .header__nav a:not(.theme-toggle) {
    display: none;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

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

  .interview__step {
    flex-direction: column;
    align-items: flex-start;
  }

  .interview__timeline::before {
    display: none;
  }

  .interview__step-number {
    width: 44px;
    height: 44px;
    font-size: var(--text-base);
  }
}