/* ========================================
   Variables
   ======================================== */
:root {
  /* Colors */
  --color-bg: #f5f5f5; /* warm light gray background */
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-surface-muted: #f0f0f0;

  --color-text: #1f1f23; /* charcoal black */
  --color-text-muted: #6b6b73;
  --color-border-subtle: #dedede;

  --color-primary: #3c5f7f; /* muted blue */
  --color-primary-soft: #e0e7f0;
  --color-primary-dark: #2d475f;

  --color-accent: #b87333; /* copper accent */

  --color-success: #2b8a3e;
  --color-success-soft: #e2f4e7;

  --color-warning: #b8860b;
  --color-warning-soft: #fff6dd;

  --color-danger: #c0392b;
  --color-danger-soft: #fdecea;

  --gray-50: #f9f9fa;
  --gray-100: #f0f0f2;
  --gray-200: #dedee3;
  --gray-300: #c5c5ce;
  --gray-400: #a4a4b0;
  --gray-500: #838391;
  --gray-600: #646472;
  --gray-700: #4a4a57;
  --gray-800: #30303a;
  --gray-900: #181820;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Playfair Display", "Times New Roman", serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 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 */

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px) */
  --space-0: 0;
  --space-1: 2px;
  --space-2: 4px;
  --space-3: 6px;
  --space-4: 8px;
  --space-5: 10px;
  --space-6: 12px;
  --space-8: 16px;
  --space-10: 20px;
  --space-12: 24px;
  --space-16: 32px;
  --space-20: 40px;
  --space-24: 48px;
  --space-28: 56px;
  --space-32: 64px;
  --space-40: 80px;
  --space-48: 96px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 20px 45px rgba(15, 23, 42, 0.18);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 260ms ease-out;

  /* Layout */
  --container-max-width: 1120px;
  --container-padding-x: 20px;
}

/* Reduced motion adjustments */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
    --transition-slow: 0ms;
  }
}

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

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

img {
  height: auto;
}

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

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

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

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}

textarea {
  resize: vertical;
}

:focus {
  outline: none;
}

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

/* ========================================
   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-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  min-height: 60vh;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--gray-900);
}

h1 {
  font-size: clamp(2.25rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
}

h2 {
  font-size: clamp(1.875rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

h3 {
  font-size: clamp(1.5rem, 2.2vw, 1.75rem);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

strong {
  font-weight: 600;
}

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

a {
  position: relative;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transition: width var(--transition-base);
}

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

a:hover::after {
  width: 100%;
}

a:focus-visible::after {
  width: 100%;
}

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

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-16) 0;
}

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

.section {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

.section--tight {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

@media (min-width: 768px) {
  .section {
    padding-top: var(--space-40);
    padding-bottom: var(--space-40);
  }
}

/* Flex utilities */
.flex {
  display: flex;
}

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

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

.flex-row {
  flex-direction: row;
}

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

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

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

.gap-md {
  gap: var(--space-8);
}

.gap-lg {
  gap: var(--space-16);
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-16);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-16);
}

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

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

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

.m-auto {
  margin: auto;
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-6); }
.mt-md { margin-top: var(--space-12); }
.mt-lg { margin-top: var(--space-20); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-6); }
.mb-md { margin-bottom: var(--space-12); }
.mb-lg { margin-bottom: var(--space-20); }

.pt-0 { padding-top: 0; }
.pt-sm { padding-top: var(--space-6); }
.pt-md { padding-top: var(--space-12); }
.pt-lg { padding-top: var(--space-20); }

.pb-0 { padding-bottom: 0; }
.pb-sm { padding-bottom: var(--space-6); }
.pb-md { padding-bottom: var(--space-12); }
.pb-lg { padding-bottom: var(--space-20); }

/* 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;
}

/* ========================================
   Form Elements
   ======================================== */
input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-300);
  background-color: var(--color-bg-alt);
  color: var(--color-text);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              background-color var(--transition-base);
}

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

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

input[disabled],
select[disabled],
textarea[disabled] {
  background-color: var(--gray-100);
  cursor: not-allowed;
  color: var(--gray-500);
}

label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-800);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-dark));
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background-color: var(--color-bg-alt);
  border-color: var(--gray-300);
  color: var(--gray-900);
}

.btn-secondary:hover {
  background-color: var(--gray-100);
  border-color: var(--gray-400);
}

.btn-ghost {
  background-color: transparent;
  color: var(--gray-800);
}

.btn-ghost:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #d38a3f);
  color: #ffffff!important;
  box-shadow: var(--shadow-md);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #9a5e26, var(--color-accent));
}

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

.btn-icon {
  padding: 8px 10px;
}

/* ========================================
   Card & Surfaces
   ======================================== */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(15, 23, 42, 0.03);
}

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

.card-header {
  margin-bottom: var(--space-8);
}

.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-footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

/* ========================================
   Alerts / Status (Optional helpers)
   ======================================== */
.alert {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
}

.alert-success {
  background-color: var(--color-success-soft);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-soft);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert-danger {
  background-color: var(--color-danger-soft);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

/* ========================================
   Accessibility Helpers
   ======================================== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #ffffff;
  color: var(--color-primary-dark);
  padding: 8px 16px;
  z-index: 1000;
  border-radius: 0 0 var(--radius-md) 0;
  box-shadow: var(--shadow-sm);
}

.skip-link:focus-visible {
  top: 0;
}

/* High contrast focus ring on dark backgrounds */
.on-dark :focus-visible {
  outline-color: #ffffff;
}

/* ========================================
   Media Helpers (for before/after imagery)
   ======================================== */
.media-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #000;
}

.media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
  background-color: rgba(0, 0, 0, 0.55);
  color: #ffffff;
}

.media-caption--before {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.7));
}

.media-caption--after {
  background: linear-gradient(135deg, rgba(184, 115, 51, 0.95), rgba(60, 95, 127, 0.9));
}

/* ========================================
   Utility Colors (text / background)
   ======================================== */
.text-muted {
  color: var(--color-text-muted);
}

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

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

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

.bg-dark {
  background-color: var(--gray-900);
  color: #ffffff;
}

.border-subtle {
  border: 1px solid var(--color-border-subtle);
}

/* End of base.css */