/* ==========================================================================
   CSS Reset & Base Styles
   ========================================================================== */

/* Box sizing reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Remove default list styles */
ul,
ol {
    list-style: none;
}

/* Remove default link styling */
a {
    text-decoration: none;
    color: inherit;
}

/* Remove default button styling */
button {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
    color: inherit;
}

/* Improve media defaults */
img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

/* Remove built‑in form typography styles */
input,
textarea,
select,
button {
    font: inherit;
}

/* Avoid text overflow */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/* ==========================================================================
   CSS Variables (Design Tokens)
   ========================================================================== */

:root {
    /* Color Palette – Brown Tones */
    --color-brown-light: #D7CCC8;
    --color-brown-medium: #A1887F;
    --color-brown-dark: #8D6E63;

    /* Accent Colors */
    --color-accent-green: #81C784;
    --color-accent-blue: #4FC3F7;

    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-off-white: #FAFAFA;
    --color-gray-light: #F5F5F5;
    --color-gray-medium: #9E9E9E;
    --color-gray-dark: #424242;
    --color-black: #212121;

    /* Typography */
    --font-primary: 'Open Sans', sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2rem;     /* 32px */
    --space-xl: 3rem;     /* 48px */
    --space-2xl: 4rem;    /* 64px */

    /* Border Radius */
    --radius-sm: 0.25rem; /* 4px */
    --radius-md: 0.5rem;  /* 8px */
    --radius-lg: 1rem;    /* 16px */

    /* Container Width */
    --container-max-width: 1200px;
    --container-padding: var(--space-md);

    /* Transition */
    --transition-speed: 0.3s;
    --transition-easing: ease-in-out;
}

/* ==========================================================================
   Base Typography
   ========================================================================== */

html {
    font-size: 100%; /* 16px */
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    color: var(--color-black);
    background-color: var(--color-off-white);
}

/* Heading Hierarchy */
h1, h2, h3, h4 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

h1 {
    font-size: 2.5rem; /* 40px */
}

h2 {
    font-size: 2rem; /* 32px */
}

h3 {
    font-size: 1.5rem; /* 24px */
}

h4 {
    font-size: 1.25rem; /* 20px */
}

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

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Skip Link (Accessibility)
   ========================================================================== */

.skip-link {
    position: absolute;
    top: -3rem;
    left: 0;
    background-color: var(--color-brown-dark);
    color: var(--color-white);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    z-index: 9999;
    transition: top var(--transition-speed) var(--transition-easing);
}

.skip-link:focus {
    top: var(--space-sm);
    outline: 3px solid var(--color-accent-blue);
    outline-offset: 2px;
}

/* ==========================================================================
   Site Header & Navigation
   ========================================================================== */

.site-header {
    background-color: var(--color-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-sm) 0;
}

.logo {
    text-align: center;
    margin-bottom: var(--space-sm);
}

.site-title {
    font-size: 1.75rem;
    color: var(--color-brown-dark);
    margin-bottom: 0;
}

.site-subtitle {
    color: var(--color-gray-medium);
    font-size: 0.875rem;
}

.menu-toggle {
    display: block;
    width: 44px;
    height: 44px;
    position: relative;
    border: 1px solid var(--color-brown-light);
    border-radius: var(--radius-sm);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-brown-dark);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-brown-dark);
    left: 0;
}

.hamburger::before {
    top: -6px;
}

.hamburger::after {
    bottom: -6px;
}

.nav-menu {
    display: none;
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
    width: 100%;
}

.nav-menu.active {
    display: flex;
}

.nav-menu a {
    display: block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    color: var(--color-gray-dark);
    font-weight: var(--font-weight-medium);
    transition: background-color var(--transition-speed) var(--transition-easing);
}

.nav-menu a:hover,
.nav-menu a:focus {
    background-color: var(--color-brown-light);
}

.nav-menu a.active {
    background-color: var(--color-brown-medium);
    color: var(--color-white);
    font-weight: var(--font-weight-bold);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    background-color: var(--color-brown-light);
    padding: var(--space-xl) 0;
    color: var(--color-black);
}

.hero-content {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-size: 2.25rem;
    margin-bottom: var(--space-sm);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.button {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-bold);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-easing);
    min-height: 44px;
    min-width: 44px;
    border: 2px solid transparent;
}

.button-primary {
    background-color: var(--color-brown-dark);
    color: var(--color-white);
}

.button-primary:hover,
.button-primary:focus {
    background-color: var(--color-brown-medium);
    outline: 3px solid var(--color-accent-blue);
    outline-offset: 2px;
}

.button-secondary {
    background-color: transparent;
    color: var(--color-brown-dark);
    border-color: var(--color-brown-dark);
}

.button-secondary:hover,
.button-secondary:focus {
    background-color: var(--color-brown-dark);
    color: var(--color-white);
}

.hero-image {
    display: block;
    height: 300px;
    border-radius: var(--radius-lg);
    margin: 0 auto;
    max-width: 800px;
    overflow: hidden;
    position: relative;
}

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

/* ==========================================================================
   About Section
   ========================================================================== */

.about {
    padding: var(--space-xl) 0;
    background-color: var(--color-white);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-lg);
    color: var(--color-brown-dark);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.about-image {
    display: block;
    height: 300px;
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    overflow: hidden;
    position: relative;
}

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

.about-text {
    flex: 1;
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services {
    padding: var(--space-xl) 0;
    background-color: var(--color-gray-light);
}

.section-subtitle {
    text-align: center;
    margin-bottom: var(--space-xl);
    color: var(--color-gray-dark);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {