:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #e9ecef;
    --shadow: 0 5px 15px rgba(0,0,0,0.05);
    --header-bg: #ffffff;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --success-color: #28a745;
}

[data-theme="dark"] {
    --primary-color: #3a8fdc;
    --primary-hover: #2c6ea8;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #333333;
    --shadow: 0 5px 15px rgba(0,0,0,0.3);
    --header-bg: #1e1e1e;
    --input-bg: #2d2d2d;
    --input-border: #444444;
    --success-color: #4caf50;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--header-bg);
    box-shadow: var(--shadow);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-items {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-color);
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: background-color 0.3s;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border);
    border-radius: 5px;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
    transition: border-color 0.3s, background-color 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--border-color) 100%);
    padding: 6rem 2rem;
    text-align: center;
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Features */
.features {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    padding: 4rem 0;
}

.feature-card {
    flex: 1;
    min-width: 280px;
    max-width: 350px;
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: var(--primary-color);
}

/* Order Page Specifics */
.order-section {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
}

.price-tag {
    float: right;
    font-weight: bold;
    color: var(--success-color);
    font-size: 1.1rem;
}

.total-bar {
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: right;
    font-size: 1.3em;
    font-weight: bold;
    margin-top: 2rem;
    border: 1px solid var(--border-color);
}

/* Footer */
footer {
    background-color: var(--header-bg);
    color: var(--text-muted);
    text-align: center;
    padding: 2rem;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}