/* Best Pho House Riverside - Main Styles */

/* Color Palette */
:root {
    --primary-red: #d32f2f;
    --dark-red: #b71c1c;
    --accent-red: #ff5252;
    --black: #000000;
    --dark-gray: #1a1a1a;
    --medium-gray: #333333;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --text-dark: #212121;
    --text-light: #757575;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 60px 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

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

@media (hover: hover) {
    .btn-primary:hover {
        background-color: var(--dark-red);
        transform: translateY(-2px);
        box-shadow: 0 4px 8px rgba(211, 47, 47, 0.3);
    }
}

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

@media (hover: hover) {
    .btn-secondary:hover {
        background-color: var(--medium-gray);
    }
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-red);
    color: var(--primary-red);
}

@media (hover: hover) {
    .btn-outline:hover {
        background-color: var(--primary-red);
        color: var(--white);
    }
}

/* Section Titles */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    color: var(--primary-red);
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 1.5rem;
    color: var(--primary-red);
    margin-bottom: 10px;
}

.card-description {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.6;
}

/* Grid System */
.grid {
    display: grid;
    gap: 30px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-red {
    color: var(--primary-red);
}

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

.bg-dark {
    background-color: var(--dark-gray);
    color: var(--white);
}

.mb-1 {
    margin-bottom: 10px;
}

.mb-2 {
    margin-bottom: 20px;
}

.mb-3 {
    margin-bottom: 30px;
}

.mt-1 {
    margin-top: 10px;
}

.mt-2 {
    margin-top: 20px;
}

.mt-3 {
    margin-top: 30px;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-red);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.4);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

@media (hover: hover) {
    .scroll-to-top:hover {
        background-color: var(--dark-red);
        transform: translateY(-5px);
        box-shadow: 0 6px 20px rgba(211, 47, 47, 0.5);
    }
}

.scroll-to-top:active {
    transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .section {
        padding: 40px 0;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .grid {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
}