/* ========================================================================== 
   Variables
   ========================================================================== */

:root {
  /* Colors */
  --color-background: #f5f5f3; /* soft, natural off-white */
  --color-surface: #ffffff;
  --color-text: #202224;
  --color-text-muted: #6b7075;

  --color-primary: #2d5a3a; /* deep green */
  --color-primary-soft: #e0ebe3;
  --color-success: #2f8f46;
  --color-warning: #d39b26;
  --color-danger: #b53939;

  --color-gray-50: #f7f7f6;
  --color-gray-100: #ececeb;
  --color-gray-200: #d6d6d4;
  --color-gray-300: #c0c0bd;
  --color-gray-400: #a1a19d;
  --color-gray-500: #82827e;
  --color-gray-600: #666662;
  --color-gray-700: #4b4b47;
  --color-gray-800: #32322f;
  --color-gray-900: #191918;

  --color-wood: #7b5a38;  /* natural wood brown */
  --color-stone: #5e646a; /* stone gray */

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "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-md: 1.0625rem; /* 17px */
  --font-size-lg: 1.25rem;   /* 20px */
  --font-size-xl: 1.5rem;    /* 24px */
  --font-size-2xl: 1.875rem; /* 30px */
  --font-size-3xl: 2.25rem;  /* 36px */
  --font-size-4xl: 3rem;     /* 48px */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* 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-14: 3.5rem;  /* 56px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-full: 999px;

  /* Shadows (subtle, architectural) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 18px 45px rgba(15, 23, 42, 0.18);

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

/* Larger screens typography adjustments */
@media (min-width: 768px) {
  :root {
    --font-size-base: 1.0625rem; /* 17px */
    --font-size-lg: 1.3125rem;   /* 21px */
    --font-size-xl: 1.75rem;     /* 28px */
    --font-size-2xl: 2.125rem;   /* 34px */
    --font-size-3xl: 2.5rem;     /* 40px */
    --font-size-4xl: 3.25rem;    /* 52px */
  }
}

/* ========================================================================== 
   Reset / Normalize
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img,
video {
  height: auto;
}

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

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

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

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

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

textarea {
  resize: vertical;
}

/* ========================================================================== 
   Base styles
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.025em;
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--font-size-2xl);
  letter-spacing: -0.02em;
  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-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  /* comfortable line length */
}

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

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

strong {
  font-weight: 600;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  text-underline-offset: 0.14em;
  transition: color var(--transition-base);
}

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

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

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

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

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

/* Layout helpers */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  max-width: 72rem; /* ~1152px: wide enough for architectural visuals */
}

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

.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;
}

.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: minmax(0, 1fr);
  }
}

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

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

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }
.pt-8 { padding-top: var(--space-8); }
.pb-8 { padding-bottom: var(--space-8); }

/* 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;
}

.sr-only-focusable:active,
.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

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

/* Buttons */

.btn {
  --btn-bg: var(--color-primary);
  --btn-color: #ffffff;
  --btn-border: transparent;
  --btn-bg-hover: #23452c;
  --btn-bg-active: #1b3522;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  padding: 0.8em 1.6em;
  border-radius: var(--radius-full);
  border: 1px solid var(--btn-border);
  background-color: var(--btn-bg);
  color: var(--btn-color)!important;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn:hover {
  background-color: var(--btn-bg-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.btn:active {
  background-color: var(--btn-bg-active);
  box-shadow: none;
  transform: translateY(0);
}

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

.btn[disabled],
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
  transform: none;
}

.btn--outline {
  --btn-bg: #ffffff;
  --btn-color: var(--color-primary);
  --btn-border: var(--color-primary);
  --btn-bg-hover: #fff;
  --btn-bg-active: #fff;
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-color: var(--color-text);
  --btn-border: transparent;
  --btn-bg-hover: rgba(24, 26, 27, 0.04);
  --btn-bg-active: rgba(24, 26, 27, 0.08);
}

/* Inputs */

.input,
select,
textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-300);
  background-color: var(--color-surface);
  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-gray-500);
}

.input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(45, 90, 58, 0.2);
}

.input[disabled],
select[disabled],
textarea[disabled] {
  cursor: not-allowed;
  background-color: var(--color-gray-50);
  color: var(--color-gray-500);
}

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

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

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

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

/* Cards */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 23, 42, 0.04);
  box-shadow: var(--shadow-xs);
  padding: var(--space-6);
  overflow: hidden;
}

.card--elevated {
  box-shadow: var(--shadow-md);
}

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

.card__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  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-sm);
}

/* Accent surfaces for testimonials or pricing */

.surface-wood {
  background: linear-gradient(135deg, #7b5a38, #9b6d42);
  color: #fefdfb;
}

.surface-stone {
  background: linear-gradient(135deg, #5e646a, #3d4348);
  color: #f7f7f6;
}

.surface-wood .card,
.surface-stone .card {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.14);
}

/* ========================================================================== 
   Accessibility & Motion
   ========================================================================== */

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