/* ------------------------------------------- */
/* 0. CSS Variables & Base Styles              */
/* ------------------------------------------- */
:root {
    /* Colors */
    --primary: #ff3c3c; /* Red */
    --secondary: #ffffff; /* White */
    --text: #333;
    --dark-bg: #1f1f1f;
    --light-bg: #f7f7f7;
    --accent-dark: #cc3030; /* Darker primary for hover */

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;

    /* Border Radius */
    --radius: 10px;

    /* Transitions */
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Arial', sans-serif;
    color: var(--text);
    background-color: var(--secondary);
    line-height: 1.6;
}

html {
    scroll-behavior: smooth;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

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

a:hover, a:focus {
    color: var(--accent-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Responsive Typography using clamp() */
h1 { font-size: clamp(2.2rem, 6vw + 1rem, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw + 1rem, 3rem); margin-bottom: var(--spacing-lg); }
h3 { font-size: clamp(1.4rem, 3vw + 1rem, 2.2rem); }

.section-heading {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 700;
}

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

/* Buttons */
.btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: bold;
    text-align: center;
    transition: background-color var(--transition-speed), transform 0.1s, box-shadow var(--transition-speed);
    text-transform: uppercase;
    flex-grow: 1;
}

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

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: var(--light-bg);
    color: var(--text);
    border: 1px solid var(--primary);
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--primary);
    color: var(--secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* ------------------------------------------- */
/* 1. HEADER (Sticky and Responsive)           */
/* ------------------------------------------- */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--secondary);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    width: 100%;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo img {
    height: 35px; /* Mobile size */
    width: auto;
}

/* Mobile Navigation (Default) */
.main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--secondary);
    border-top: 1px solid var(--light-bg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed) ease-in-out;
}

.main-nav.open {
    max-height: 500px;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md) 0;
}

.nav-list li a {
    display: block;
    padding: 0.75rem var(--spacing-lg);
    border-bottom: 1px solid var(--light-bg);
    color: var(--text);
    font-weight: 500;
}

.nav-list li a:hover, .nav-list li a:focus {
    background-color: var(--light-bg);
    color: var(--primary);
}

.hamburger {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--primary);
    cursor: pointer;
    padding: 0.25rem;
    transition: transform var(--transition-speed);
}
.hamburger[aria-expanded="true"] {
    transform: rotate(90deg);
}

/* ------------------------------------------- */
/* 3. SERVICES SECTION (Dynamic Dropdowns & Cards) */
/* ------------------------------------------- */
.services-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--light-bg);
}

.service-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.service-controls select {
    padding: 0.75rem;
    border-radius: var(--radius);
    border: 1px solid #ccc;
    font-size: 1rem;
    width: 100%;
    appearance: none; /* Hide default arrow */
    background: var(--secondary) url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3e%3cpath fill='%23ff3c3c' d='M10.293 3.293L6 7.586 1.707 3.293A1 1 0 00.293 4.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z'/%3e%3c/svg%3e") no-repeat right 0.75rem center / 12px;
}

.service-cards-grid {
    display: grid;
    /* Mobile: 1 per row */
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.service-card h3 {
    color: var(--primary);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.features-list {
    list-style: none;
    padding-left: 0;
    margin: var(--spacing-sm) 0 var(--spacing-md);
    line-height: 1.8;
}

.features-list li::before {
    content: "✔️";
    margin-right: 0.5rem;
    color: var(--primary);
}

.service-pricing {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
    text-align: center;
    margin: var(--spacing-md) 0;
    flex-grow: 1; /* Pushes footer to the bottom */
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.card-footer {
    text-align: right;
    font-size: 0.75rem;
    color: #888;
    margin-top: var(--spacing-md);
    border-top: 1px dashed var(--light-bg);
    padding-top: var(--spacing-sm);
}

/* ------------------------------------------- */
/* MEDIA QUERIES (Breakpoints)                 */
/* ------------------------------------------- */

/* Tablet (768px and up) */
@media screen and (min-width: 768px) {
    /* HEADER: Desktop/Tablet Nav */
    .logo img {
        height: 40px;
    }
    .hamburger {
        display: none;
    }
    .main-nav {
        position: static;
        max-height: none;
        overflow: visible;
        border-top: none;
        width: auto;
    }
    .nav-list {
        flex-direction: row;
        gap: var(--spacing-md);
        padding: 0;
    }
    .nav-list li a {
        padding: 0.5rem 0.75rem;
        border-bottom: none;
    }
    .nav-list li a:hover, .nav-list li a:focus {
        background-color: transparent;
        color: var(--primary);
        border-bottom: 2px solid var(--primary);
    }

    /* SERVICES: 2 per row */
    .service-controls {
        flex-direction: row;
        gap: var(--spacing-lg);
    }
    .service-controls select {
        width: 33.33%;
    }
    .service-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .card-actions {
        flex-direction: row;
        justify-content: space-between;
    }
    .card-actions .btn {
        width: 48%; /* Adjusting button width for row layout */
    }
}

/* Desktop (1024px and up) */
@media screen and (min-width: 1024px) {
    .logo img {
        height: 50px;
    }

    /* SERVICES: 3 per row */
    .service-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}