/* ============================================
   Maria Rudakova — Psychology Practice
   Dark, sophisticated, consulting-firm aesthetic
   Mountain animation + frosted glass + photo
   ============================================ */

/* --- 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 (4px base) */
  --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;

  /* Dark palette — sophisticated consulting aesthetic */
  --color-bg: #141413;
  --color-surface: #1a1a19;
  --color-surface-2: #212120;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);
  --color-divider: rgba(255, 255, 255, 0.06);

  /* Text */
  --color-text: #e8e6e1;
  --color-text-muted: #9a9890;
  --color-text-faint: #5e5d58;

  /* Accent — muted warm gold */
  --color-primary: #b8a47a;
  --color-primary-hover: #cdb88e;
  --color-primary-active: #a39068;

  /* Glass */
  --glass-bg: rgba(20, 20, 19, 0.55);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);

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

  /* Font families */
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body: 'Switzer', 'Helvetica Neue', 'Arial', sans-serif;
}

/* --- Global --- */
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

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

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

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-10);
  }
}

/* --- Glass Card --- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--space-5);
  transition: background 0.4s ease, backdrop-filter 0.4s ease;
}

.nav.scrolled {
  background: rgba(20, 20, 19, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.nav-logo svg {
  width: 32px;
  height: 32px;
}

.nav-logo-text {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-interactive);
}

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

.nav-cta {
  font-size: var(--text-sm);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-sm);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive);
}

.nav-cta:hover {
  background: rgba(184, 164, 122, 0.08);
  color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Mobile menu button */
.nav-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}

.nav-menu-btn:hover {
  color: var(--color-text);
}

@media (min-width: 768px) {
  .nav-menu-btn {
    display: none;
  }
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(20, 20, 19, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu-close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}

.mobile-menu-close:hover {
  color: var(--color-text);
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.mobile-menu a:hover {
  color: var(--color-primary);
}

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

.section-divider {
  width: 100%;
  height: 1px;
  background: var(--color-divider);
  border: none;
}

/* ========================================
   HERO — Mountain animation like kailas-lab.ru
   ======================================== */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: var(--space-24);
  padding-bottom: var(--space-16);
  position: relative;
  overflow: hidden;
}

/* Separate background layer for parallax */
.hero-bg {
  position: absolute;
  inset: -20px;
  background: url('./hero-kailas.webp') 55% center / cover no-repeat;
  will-change: transform;
  animation: heroBackgroundSettle 1400ms var(--ease-spring) both;
}

/* Load animation — subtle scale settle */
@keyframes heroBackgroundSettle {
  from { transform: scale(1.06); }
  to   { transform: scale(1.02); }
}

/* Dark gradient overlay — left-to-right like kailas-lab */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(20, 20, 19, 0.92) 0%,
    rgba(20, 20, 19, 0.78) 35%,
    rgba(20, 20, 19, 0.45) 65%,
    rgba(20, 20, 19, 0.25) 100%
  );
  z-index: 1;
}

/* Scan line — decorative animated line */
.hero-scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    var(--color-primary) 20%,
    rgba(184, 164, 122, 0.4) 50%,
    var(--color-primary) 80%,
    transparent 100%
  );
  opacity: 0;
  z-index: 2;
  animation: heroScan 4s var(--ease-spring) 600ms both;
}

@keyframes heroScan {
  0%   { top: 20%; opacity: 0; transform: scaleX(0.6); }
  8%   { opacity: 0.6; }
  50%  { top: 65%; opacity: 0.3; transform: scaleX(1); }
  100% { top: 85%; opacity: 0; transform: scaleX(0.8); }
}

.hero .container {
  position: relative;
  z-index: 3;
}

.hero-content {
  max-width: 800px;
}

/* Hero text entry animations */
.hero-anim {
  opacity: 0;
  animation: heroCopyIn 760ms var(--ease-spring) both;
}

.hero-anim-line {
  opacity: 0;
  animation: heroLineIn 820ms var(--ease-spring) both;
}

@keyframes heroCopyIn {
  from { opacity: 0; transform: translate3d(0, 14px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes heroLineIn {
  from { opacity: 0; transform: scaleX(0.72); transform-origin: left center; }
  to   { opacity: 1; transform: scaleX(1); transform-origin: left center; }
}

/* Hero divider line */
.hero-divider {
  width: 60px;
  height: 1px;
  background: var(--color-primary);
  margin-bottom: var(--space-6);
  opacity: 0.6;
}

.hero-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  font-weight: 400;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  line-height: 1.1;
}

.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 540px;
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

/* --- Buttons --- */
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  text-decoration: none;
  letter-spacing: 0.03em;
  cursor: pointer;
  background: transparent;
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
}

.btn-outline:hover {
  background: rgba(184, 164, 122, 0.08);
  color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-outline:active {
  transform: translateY(0);
}

.btn-outline .arrow {
  transition: transform var(--transition-interactive);
}

.btn-outline:hover .arrow {
  transform: translateX(3px);
}

/* ========================================
   ABOUT — Photo + text like kailas-lab.ru
   ======================================== */
.about-grid {
  display: grid;
  gap: var(--space-12);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-16);
    align-items: start;
  }
}

.about-label {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.about h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-8);
  line-height: 1.15;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.75;
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* Photo styling — kailas-lab reference */
.about-photo-col {
  display: flex;
  justify-content: center;
}

@media (min-width: 768px) {
  .about-photo-col {
    justify-content: flex-end;
    padding-top: var(--space-8);
  }
}

.about-photo-wrapper {
  position: relative;
  max-width: 340px;
  width: 100%;
}

/* Gold accent stripe on left */
.about-photo-accent {
  position: absolute;
  left: -12px;
  top: 12px;
  bottom: 12px;
  width: 4px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--color-primary) 15%,
    var(--color-primary-hover) 50%,
    var(--color-primary) 85%,
    transparent 100%
  );
  border-radius: 2px;
  opacity: 0.9;
  box-shadow: 0 0 8px rgba(184, 164, 122, 0.3);
}

.about-photo {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
  filter: brightness(0.95) contrast(1.02);
  transition: filter 0.4s ease;
}

.about-photo-wrapper:hover .about-photo {
  filter: brightness(1) contrast(1);
}

/* Credentials below the grid */
.about-credentials-section {
  margin-top: var(--space-12);
}

.about-credentials {
  padding: var(--space-8);
}

.about-credentials h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.credential-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.credential-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.6;
}

.credential-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 1px;
  background: var(--color-primary);
  opacity: 0.5;
}

/* --- Services --- */
.services h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-4);
}

.services-intro {
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: var(--space-12);
  line-height: 1.7;
}

.services-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

.service-card {
  padding: var(--space-8);
  transition:
    border-color var(--transition-interactive),
    background var(--transition-interactive);
}

.service-card:hover {
  border-color: var(--color-border-hover);
  background: rgba(20, 20, 19, 0.7);
}

.service-card-number {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-6);
  font-variant-numeric: tabular-nums;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-5);
}

.service-card-desc {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.service-card-topics {
  margin-bottom: var(--space-6);
}

.service-card-topics h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.service-card-topics ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.service-card-topics li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.service-card-meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* --- Process --- */
.process h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-4);
}

.process-intro {
  color: var(--color-text-muted);
  max-width: 480px;
  margin-bottom: var(--space-12);
  line-height: 1.7;
}

.process-steps {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.process-step {
  position: relative;
}

.step-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  opacity: 0.6;
}

.process-step h3 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.process-step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Step connector line on desktop */
@media (min-width: 768px) {
  .process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 1.2em;
    right: calc(-1 * var(--space-4));
    width: var(--space-8);
    height: 1px;
    background: var(--color-divider);
  }
}

/* --- Pricing --- */
.pricing {
  text-align: left;
}

.pricing h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-6);
}

.pricing-note {
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.pricing-detail {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  line-height: 1.7;
}

/* --- Contact / CTA --- */
.contact {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

.contact-inner {
  max-width: 640px;
}

.contact h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-6);
}

.contact-text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--transition-interactive);
}

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

.contact-link-label {
  color: var(--color-text-faint);
  min-width: 7em;
}

/* --- Mountain silhouette footer decoration --- */
.site-mountains {
  height: 80px;
  color: var(--color-text-faint);
  overflow: hidden;
  margin-top: -1px;
}

.site-mountains svg {
  width: 100%;
  height: 100%;
  display: block;
}

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

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

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

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

/* --- Scroll Reveal 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 80%;
  }
}

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

/* JS fallback for browsers without scroll-driven animations */
.js-reveal {
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}

.js-reveal.visible {
  opacity: 1;
}

/* If scroll-driven animations are supported, don't use JS reveals */
@supports (animation-timeline: scroll()) {
  .js-reveal {
    opacity: 1;
    transition: none;
  }
  .js-reveal.visible {
    opacity: 1;
  }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .hero-bg,
  .hero-anim,
  .hero-anim-line,
  .hero-scan-line {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}