/* ==========================================================================
   Variables
   ========================================================================== */
:root {
  /* Colors */
  --color-background: #05060a; /* deep cosmic background */
  --color-surface: rgba(10, 12, 20, 0.85);
  --color-surface-elevated: rgba(18, 22, 35, 0.95);
  --color-text: #f5f7ff;
  --color-text-muted: #b7bdd9;

  --color-primary: #e53935; /* deep runic red */
  --color-primary-soft: rgba(229, 57, 53, 0.2);
  --color-primary-strong: #ff5252;

  --color-accent: #00c853; /* emerald magic green */
  --color-accent-soft: rgba(0, 200, 83, 0.2);
  --color-accent-strong: #1eff8b;

  --color-success: #4caf50;
  --color-warning: #ffb300;
  --color-danger: #ff5252;

  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;

  /* Overlays & effects */
  --overlay-soft: rgba(3, 8, 20, 0.6);
  --overlay-strong: rgba(3, 8, 20, 0.85);
  --glass-bg: rgba(10, 14, 30, 0.65);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-highlight: rgba(255, 255, 255, 0.06);

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-display: "Cinzel", "Cormorant Garamond", "Playfair Display", serif;
  --font-mono: "Fira Code", "SF Mono", ui-monospace, Menlo, Monaco, monospace;

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

  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (0–96px) */
  --space-0: 0;
  --space-1: 0.125rem; /* 2px */
  --space-2: 0.25rem;  /* 4px */
  --space-3: 0.375rem; /* 6px */
  --space-4: 0.5rem;   /* 8px */
  --space-5: 0.625rem; /* 10px */
  --space-6: 0.75rem;  /* 12px */
  --space-8: 1rem;     /* 16px */
  --space-10: 1.25rem; /* 20px */
  --space-12: 1.5rem;  /* 24px */
  --space-16: 2rem;    /* 32px */
  --space-20: 2.5rem;  /* 40px */
  --space-24: 3rem;    /* 48px */
  --space-32: 4rem;    /* 64px */
  --space-40: 5rem;    /* 80px */
  --space-48: 6rem;    /* 96px */

  /* Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* Shadows */
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-medium: 0 18px 45px rgba(0, 0, 0, 0.45);
  --shadow-strong: 0 30px 80px rgba(0, 0, 0, 0.65);
  --shadow-glow-red: 0 0 25px rgba(229, 57, 53, 0.7);
  --shadow-glow-green: 0 0 25px rgba(0, 200, 83, 0.7);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 200ms ease-out;
  --transition-slow: 320ms ease-out;

  /* Layout */
  --container-max-width: 1200px;
  --nav-height: 72px;
}

@media (min-width: 1024px) {
  :root {
    --font-size-base: 1.0625rem;
    --font-size-lg: 1.175rem;
    --font-size-xl: 1.35rem;
    --font-size-2xl: 1.7rem;
    --font-size-3xl: 2.1rem;
    --font-size-4xl: 2.6rem;
    --font-size-5xl: 3.4rem;
  }
}

/* ==========================================================================
   Reset / Normalize
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
}

h1, h2, h3, h4, h5, h6,
p, figure, blockquote,
dl, dd {
  margin: 0;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

img {
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
}

button {
  border: none;
  padding: 0;
  background: none;
}

textarea {
  resize: vertical;
}

a {
  text-decoration: none;
  color: inherit;
}

body {
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-background);
  color: var(--color-text);
  background-image: radial-gradient(circle at 0% 0%, rgba(229, 57, 53, 0.18), transparent 55%),
                    radial-gradient(circle at 100% 100%, rgba(0, 200, 83, 0.18), transparent 55%),
                    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.03), transparent 60%);
}

main {
  min-height: calc(100vh - var(--nav-height));
}

::selection {
  background: rgba(229, 57, 53, 0.85);
  color: #ffffff;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gray-50);
}

h1 {
  font-size: var(--font-size-4xl);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-10);
}

h2 {
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-8);
}

h3 {
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-6);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}

h6 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-2);
}

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

strong {
  color: var(--gray-50);
}

a {
  color: var(--color-accent-strong);
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-primary-strong);
}

code, pre {
  font-family: var(--font-mono);
}

hr {
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin: var(--space-16) 0;
}

/* ==========================================================================
   Accessibility & Motion
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--color-accent-strong);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--space-8);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-16);
  }
}

/* Layout helpers */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

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

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

.flex-column {
  display: flex;
  flex-direction: column;
}

.grid {
  display: grid;
}

.grid-auto-fit {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-10);
}

.text-center {
  text-align: center;
}

.m-auto {
  margin: auto;
}

.mt-0 { margin-top: 0; }
.mt-8 { margin-top: var(--space-8); }
.mt-16 { margin-top: var(--space-16); }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: var(--space-8); }
.mb-16 { margin-bottom: var(--space-16); }

.pt-16 { padding-top: var(--space-16); }
.pb-16 { padding-bottom: var(--space-16); }

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

/* Glassmorphism utility */
.glass-panel {
  background: var(--glass-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
}

/* Hero background overlay utility */
.hero-overlay {
  position: relative;
  isolation: isolate;
}

.hero-overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(5, 6, 10, 0.9) 0%, rgba(5, 6, 10, 0.6) 45%, rgba(5, 6, 10, 0.85) 100%);
  mix-blend-mode: multiply;
  z-index: -1;
}

.hero-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(229, 57, 53, 0.5), transparent 55%),
    radial-gradient(circle at 80% 80%, rgba(0, 200, 83, 0.5), transparent 55%);
  opacity: 0.55;
  mix-blend-mode: screen;
  z-index: -1;
}

/* ==========================================================================
   Components
   ========================================================================== */
/* Buttons */
.btn {
  --btn-bg: var(--color-primary);
  --btn-bg-hover: var(--color-primary-strong);
  --btn-color: #ffffff;

  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.18), transparent 55%),
              linear-gradient(135deg, var(--btn-bg), var(--btn-bg-hover));
  color: var(--btn-color);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-normal),
    filter var(--transition-fast);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at 10% 0%, rgba(255, 255, 255, 0.45), transparent 45%);
  opacity: 0.32;
  mix-blend-mode: screen;
  pointer-events: none;
}

.btn-primary {
  --btn-bg: var(--color-primary);
  --btn-bg-hover: var(--color-primary-strong);
}

.btn-secondary {
  --btn-bg: rgba(7, 12, 24, 0.9);
  --btn-bg-hover: rgba(12, 20, 40, 1);
  --btn-color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.28);
}

.btn-ghost {
  --btn-bg: transparent;
  --btn-bg-hover: rgba(255, 255, 255, 0.05);
  --btn-color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: none;
}

.btn-accent {
  --btn-bg: var(--color-accent);
  --btn-bg-hover: var(--color-accent-strong);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px) scale(1.01);
  box-shadow: var(--shadow-medium);
  filter: brightness(1.02);
}

.btn:active:not(:disabled) {
  transform: translateY(0) scale(0.99);
  box-shadow: var(--shadow-soft);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-icon {
  padding-inline: 1.1rem;
}

/* Form inputs */
.input,
select,
textarea {
  width: 100%;
  padding: 0.7rem 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background-color: rgba(5, 8, 18, 0.85);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal),
    transform var(--transition-fast);
}

.input::placeholder,
textarea::placeholder {
  color: rgba(183, 189, 217, 0.7);
}

.input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-accent-strong);
  box-shadow: 0 0 0 1px rgba(0, 200, 83, 0.7), 0 0 18px rgba(0, 200, 83, 0.45);
  transform: translateY(-1px);
}

.input[aria-invalid="true"],
.input.input-error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 1px rgba(255, 82, 82, 0.7);
}

label {
  display: block;
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-50);
}

.form-field {
  margin-bottom: var(--space-8);
}

.form-helper {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: var(--space-2);
}

/* Card */
.card {
  position: relative;
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(10, 12, 24, 0.98), rgba(5, 8, 18, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  background:
    radial-gradient(circle at 0 0, rgba(229, 57, 53, 0.22), transparent 60%),
    radial-gradient(circle at 100% 100%, rgba(0, 200, 83, 0.22), transparent 60%);
  opacity: 0.55;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.card-header {
  position: relative;
  margin-bottom: var(--space-6);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card-body {
  position: relative;
}

/* Cinematic hero helpers (for "Di. Svitlana" Svitlana Perediela) */
.hero-cinematic {
  position: relative;
  min-height: min(720px, 100vh);
  display: flex;
  align-items: center;
  color: var(--color-text);
  overflow: hidden;
}

.hero-cinematic__bg {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  filter: saturate(1.15) contrast(1.05);
  transform: scale(1.02);
  transform-origin: center;
}

.hero-cinematic__content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.hero-cinematic__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: var(--space-6);
}

.hero-cinematic__headline {
  font-size: clamp(2.4rem, 5vw, 3.3rem);
  line-height: 1.05;
  margin-bottom: var(--space-5);
  text-shadow: 0 22px 60px rgba(0, 0, 0, 0.9);
}

.hero-cinematic__headline span {
  background: linear-gradient(135deg, var(--color-accent-strong), var(--color-primary-strong));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-cinematic__subhead {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 34rem;
  margin-bottom: var(--space-10);
}

.hero-cinematic__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Focus styles alignment for components */
.btn:focus-visible {
  outline: 2px solid var(--color-accent-strong);
  outline-offset: 3px;
}

/* ==========================================================================
   End base.css
   ========================================================================== */