/* ========================================================================
   Variables
   ======================================================================== */
:root {
  /* Colors */
  --color-bg: #f5f7fb;                 /* soft, educational background */
  --color-surface: #ffffff;            /* primary surface */
  --color-text: #1f2933;               /* main text (navy-leaning gray) */
  --color-text-muted: #6b7380;         /* secondary text */

  --color-primary: #2f80ed;            /* sky blue */
  --color-primary-soft: #e6f1ff;       /* light primary background */

  --color-accent: #ff8a38;             /* warm orange */
  --color-accent-soft: #ffe8d6;        /* soft orange tint */

  --color-success: #24a148;            /* success green */
  --color-warning: #f5a623;            /* warm yellow/orange warning */
  --color-danger: #e01e37;             /* error red */

  --color-gray-50: #f9fafb;
  --color-gray-100: #f1f3f7;
  --color-gray-200: #e1e4eb;
  --color-gray-300: #cfd4df;
  --color-gray-400: #a5afc0;
  --color-gray-500: #7b8597;
  --color-gray-600: #5c6473;
  --color-gray-700: #434a57;
  --color-gray-800: #2a303b;
  --color-gray-900: #181c22;

  /* Typography */
  /* Example Hungarian-friendly Latin font stacks */
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Roboto", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-display: "Montserrat", "Poppins", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing scale (0–96px) */
  --space-0: 0;
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-7: 1.75rem;  /* 28px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 4px 10px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 240ms ease-out;
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
    --transition-slow: 0ms;
  }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

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

* {
  margin: 0;
}

html,
body {
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
}

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

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

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

ul,
ol {
  padding-left: 1.25rem;
}

/* Remove default link underline while preserving accessibility */
a {
  text-decoration: none;
  color: inherit;
}

/* ========================================================================
   Base Styles
   ======================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: block;
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

p + p {
  margin-top: var(--space-2);
}

small {
  font-size: var(--font-size-sm);
}

strong {
  font-weight: 600;
}

/* Headings - modern, clear hierarchy */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

h1 {
  font-size: clamp(2.25rem, 4vw, 3rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.75rem, 2.8vw, 2.25rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.5rem, 2.2vw, 1.875rem);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Spacing for headings relative to content */

h1 + p,
h2 + p,
h3 + p {
  margin-top: var(--space-2);
}

section {
  padding-block: var(--space-12);
}

/* Links */
a {
  color: var(--color-primary);
  transition: color var(--transition-base);
}

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

a:active {
  color: var(--color-primary);
}

/* Lists */
ul,
ol {
  margin-bottom: var(--space-4);
}

/* ========================================================================
   Accessibility & Focus Styles
   ======================================================================== */
:focus {
  outline: none;
}

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

/* Screen-reader only utility */
.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;
}

/* ========================================================================
   Layout Utilities
   ======================================================================== */

/* Container for readable width and consistent side padding */
.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-6);
  }
}

/* Flex 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;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-sm {
  gap: var(--space-3);
}

.gap-md {
  gap: var(--space-4);
}

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

/* Grid helpers */
.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Simple spacing utilities for vertical rhythm */
.stack-sm > * + * {
  margin-top: var(--space-3);
}

.stack-md > * + * {
  margin-top: var(--space-4);
}

.stack-lg > * + * {
  margin-top: var(--space-6);
}

/* Alignment helpers */
.text-center {
  text-align: center;
}

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

.text-muted {
  color: var(--color-text-muted);
}

/* ========================================================================
   Components
   ======================================================================== */

/* Buttons - primary actions emphasize sky blue, secondary use soft neutrals */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding-inline: var(--space-5);
  padding-block: 0.7rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
}

.button-primary {
  background: linear-gradient(135deg, var(--color-primary), #3fa9ff);
  color: #ffffff!important;
  box-shadow: var(--shadow-sm);
}

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

.button-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.button-secondary {
  background-color: #ffffff;
  color: var(--color-text);
  border-color: var(--color-gray-200);
  box-shadow: var(--shadow-xs);
}

.button-secondary:hover {
  background-color: var(--color-gray-50);
  box-shadow: var(--shadow-sm);
}

.button-ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
}

.button-ghost:hover {
  background-color: var(--color-primary-soft);
}

.button-accent {
  background: linear-gradient(135deg, var(--color-accent), #ffb347);
  color: #ffffff!important;
  box-shadow: var(--shadow-sm);
}

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

.button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Inputs - used for inquiry forms and enrollment */
.input,
textarea,
select {
  width: 100%;
  padding-inline: var(--space-3);
  padding-block: 0.65rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-300);
  background-color: #ffffff;
  color: var(--color-text);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

.input::placeholder,
textarea::placeholder {
  color: var(--color-gray-400);
}

.input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(47, 128, 237, 0.35);
}

.input-error {
  border-color: var(--color-danger);
}

.input-error:focus-visible {
  box-shadow: 0 0 0 1px rgba(224, 30, 55, 0.35);
}

.label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

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

.field-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: var(--space-1);
}

/* Card - for course offerings, instructor profiles, testimonials */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(15, 23, 42, 0.03);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base),
    border-color var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(47, 128, 237, 0.14);
}

.card-header {
  margin-bottom: var(--space-4);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

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

.card-body {
  font-size: var(--font-size-md);
  color: var(--color-text);
}

.card-footer {
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Tag / pill for levels (A1, B2, etc.) */
.tag {
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-3);
  padding-block: 0.25rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.tag-accent {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

/* Hero text helper for welcoming, motivating intro copy */
.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
}

/* Badge-style stat for success metrics (exam pass rate, etc.) */
.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding-inline: var(--space-3);
  padding-block: 0.3rem;
  border-radius: var(--radius-full);
  background-color: #ffffff;
  box-shadow: var(--shadow-xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.stat-pill strong {
  color: var(--color-primary);
}

/* Simple chip row for languages, age groups, etc. */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  padding-inline: var(--space-3);
  padding-block: 0.3rem;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-100);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ========================================================================
   Utility Color Helpers (optional but handy)
   ======================================================================== */
.bg-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.bg-accent {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

.bg-muted {
  background-color: var(--color-gray-50);
}

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

.text-accent {
  color: var(--color-accent);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-danger {
  color: var(--color-danger);
}

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