/*
 * base.css
 * Modern minimalist base styles for Vltavera restaurant & offline poker evenings
 * Mobile-first, light, airy, gastronomic & lounge-inspired
 */

/* =========================================
   Variables
   ========================================= */
:root {
  /* Color Palette */
  --color-background: #ffffff;
  --color-surface: #ffffff;
  --color-surface-soft: #f5f5f6; /* light gray sections */
  --color-surface-muted: #f1eee9; /* soft beige for subtle blocks */

  --color-text: #17181a;
  --color-text-soft: #4b4f55;
  --color-text-muted: #7a808a;

  --color-primary: #4a90e2; /* pastel / soft blue accent */
  --color-primary-soft: rgba(74, 144, 226, 0.12);

  --color-success: #2f9e6f;
  --color-warning: #e8a340;
  --color-danger: #d64545;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --font-display: "SF Pro Display", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-md: 1.0625rem; /* 17px */
  --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: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing Scale (px converted to rem based on 16px) */
  --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-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-xl: 24px;
  --radius-pill: 999px;

  /* Shadows (soft, lounge-inspired) */
  --shadow-soft: 0 6px 18px rgba(15, 23, 42, 0.06);
  --shadow-medium: 0 10px 30px rgba(15, 23, 42, 0.12);

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

  /* Layout */
  --container-max-width: 1120px;
  --container-padding-x: 1.25rem; /* mobile horizontal padding */
}

/* Larger type scale on bigger screens */
@media (min-width: 768px) {
  :root {
    --font-size-3xl: 2.125rem; /* 34px */
    --font-size-4xl: 2.5rem;   /* 40px */
    --font-size-5xl: 3.25rem;  /* 52px */
  }
}

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

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

body {
  margin: 0;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
}

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

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

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

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

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Remove default focus outlines; we reintroduce with :focus-visible */
:focus {
  outline: none;
}

/* =========================================
   Base Styles
   ========================================= */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  min-height: 60vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.015em;
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

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

p:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 600;
}

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

a {
  position: relative;
  transition: color var(--transition-base);
}

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

/* Subtle underline on hover for body links */
main a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition-base);
}

main a:not(.btn):hover::after {
  width: 100%;
}

hr {
  border: 0;
  border-top: 1px solid var(--gray-200);
  margin: var(--space-8) 0;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Section spacing */
section {
  padding-block: var(--space-10);
}

@media (min-width: 768px) {
  section {
    padding-block: var(--space-16);
  }
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

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

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

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

.section-soft-gray {
  background-color: var(--color-surface-soft);
}

.section-soft-beige {
  background-color: var(--color-surface-muted);
}

/* Spacing utilities (margin-bottom) */
.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: var(--space-2) !important; }
.mb-3 { margin-bottom: var(--space-3) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }
.mb-8 { margin-bottom: var(--space-8) !important; }

/* Flex utilities */
.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-col {
  display: flex;
  flex-direction: column;
}

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

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Grid utilities */
.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: 767px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

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

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

@media (min-width: 768px) {
  .text-md-left {
    text-align: left;
  }
}

/* =========================================
   Buttons
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #7bb3f4);
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(74, 144, 226, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(74, 144, 226, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 6px 16px rgba(74, 144, 226, 0.25);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--gray-300);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

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

.btn-ghost:hover {
  background-color: var(--color-surface-soft);
}

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

.btn:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--color-primary);
}

/* =========================================
   Form Elements
   ========================================= */
input,
select,
textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-300);
  background-color: #ffffff;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  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-text-muted);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

label {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
}

.field-group {
  margin-bottom: var(--space-4);
}

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

.field-error-text {
  margin-top: 0.25rem;
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* =========================================
   Cards & Content Blocks
   ========================================= */
.card {
  position: relative;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
}

.card-soft {
  background: linear-gradient(145deg, #ffffff, rgba(241, 238, 233, 0.65));
}

.card-muted {
  background-color: var(--color-surface-soft);
}

.card-header {
  margin-bottom: var(--space-3);
}

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

/* Hero-style card with subtle "lounge" vibe */
.card-hero {
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  background: radial-gradient(circle at top left, rgba(74, 144, 226, 0.18), transparent 55%),
              linear-gradient(135deg, #ffffff, #f6f7fb);
  box-shadow: var(--shadow-medium);
}

@media (min-width: 768px) {
  .card,
  .card-hero {
    padding: var(--space-6);
  }
}

/* Image wrapper for elegant food photography */
.media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--gray-100);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 220ms ease-out, filter 220ms ease-out;
}

.media-frame:hover img {
  transform: scale(1.02);
  filter: saturate(1.02);
}

/* =========================================
   Navigation & Header Basics
   ========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.9);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 0.7rem;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--font-size-lg);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  padding-block: 0.5rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), #7bb3f4);
  transition: width var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link--active::after {
  width: 100%;
}

.nav-link--active {
  color: var(--color-text);
}

@media (max-width: 767px) {
  .nav-menu {
    display: none; /* actual mobile navigation toggling handled by JS */
  }
}

/* =========================================
   Hero & Section Helpers
   ========================================= */
.hero {
  padding-block: var(--space-12);
}

@media (min-width: 768px) {
  .hero {
    padding-block: var(--space-20);
  }
}

.hero-eyebrow {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.hero-title {
  font-size: var(--font-size-4xl);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

.hero-text {
  max-width: 32rem;
}

.section-heading {
  max-width: 40rem;
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--space-8);
}

.section-heading p {
  margin-top: var(--space-3);
}

/* =========================================
   Footer Basics
   ========================================= */
.site-footer {
  border-top: 1px solid var(--gray-200);
  background: linear-gradient(180deg, #ffffff, #f5f5f6);
  padding-block: var(--space-10);
  font-size: var(--font-size-sm);
}

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

@media (min-width: 768px) {
  .footer-columns {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.footer-title {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--font-size-xs);
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

.footer-link {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--color-text-soft);
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-disclaimer {
  margin-top: var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
}

/* =========================================
   Notes for Theme (non-functional comments)
   - Use light gray & soft beige blocks to suggest a modern lounge mood.
   - Blue gradients & soft shadows help convey the refined, social ambience
     of the restaurant and its offline poker evenings.
   - Keep layouts airy with generous vertical spacing between sections.
   ========================================= */