/* DoorDash Brand Style System */

/* CSS Variables for DoorDash Brand Colors */
:root {
    /* Primary Colors */
    --dd-red: #FF3008;
    --dd-dark-teal: #004C52;
    --dd-teal: #17A3A9;
    
    /* Neutral Backgrounds */
    --dd-flush-100: #FFF1E7;
    --dd-light-stone: #FAF8F5;
    --dd-light-gray: #F7F7F7;
    --dd-white: #FFFFFF;
    --dd-black: #000000;
    
    /* Typography - Fallback to Proxima Nova as per brand guide */
    --font-family-primary: 'TT Norms Pro', 'Proxima Nova', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, sans-serif;
    --font-family-fallback: 'Proxima Nova', Helvetica, Arial, sans-serif;
    
    /* Header tracking */
    --header-tracking: -0.03em; /* -3% tracking */
}

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

body {
    font-family: var(--font-family-fallback);
    font-weight: 400; /* TT Norms Regular equivalent */
    line-height: 1.6;
    color: var(--dd-black);
    background-color: var(--dd-white);
}

/* Typography Hierarchy - DoorDash Brand Guide */
h1 {
    font-family: var(--font-family-primary);
    font-weight: 700; /* TT Norms Pro Demibold equivalent */
    letter-spacing: var(--header-tracking);
    font-size: 2.5rem;
    line-height: 1.2;
    color: var(--dd-black);
}

h2 {
    font-family: var(--font-family-primary);
    font-weight: 600; /* TT Norms Pro Medium equivalent */
    letter-spacing: var(--header-tracking);
    font-size: 2rem;
    line-height: 1.3;
    color: var(--dd-black);
}

h3 {
    font-family: var(--font-family-primary);
    font-weight: 600;
    letter-spacing: var(--header-tracking);
    font-size: 1.5rem;
    line-height: 1.4;
    color: var(--dd-black);
}

h4 {
    font-family: var(--font-family-primary);
    font-weight: 600;
    font-size: 1.25rem;
    line-height: 1.4;
    color: var(--dd-black);
}

/* Navigation Bar */
.navbar {
    background: linear-gradient(135deg, var(--dd-red) 0%, #FF6B4A 50%, var(--dd-teal) 100%);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(255, 48, 8, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--dd-white);
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.9;
}

.logo img {
    width: 32px;
    height: 32px;
    margin-right: 12px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dd-white);
    margin: 0;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--dd-white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.download-btn {
    background: var(--dd-white) !important;
    color: var(--dd-red) !important;
    font-weight: 600;
    padding: 0.75rem 1.5rem !important;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.download-btn:hover {
    background: var(--dd-flush-100) !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dd-white);
    margin: 3px 0;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: linear-gradient(135deg, var(--dd-red) 0%, var(--dd-teal) 100%);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        gap: 1rem;
        transition: left 0.3s ease;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-links a {
        font-size: 1.2rem;
        padding: 1rem 2rem;
        width: 80%;
        text-align: center;
    }
}

/* Button Styles - DoorDash Brand Standard */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

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

.btn-primary:hover {
    background: #e62e07;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 48, 8, 0.3);
}

.btn-secondary {
    background: var(--dd-white);
    color: var(--dd-red);
    border: 2px solid var(--dd-red);
}

.btn-secondary:hover {
    background: var(--dd-red);
    color: var(--dd-white);
}

/* Container and Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 4rem 0;
}

.hero-section {
    background: linear-gradient(135deg, var(--dd-red) 0%, #FF6B4A 50%, var(--dd-teal) 100%);
    color: var(--dd-white);
    text-align: center;
    padding: 6rem 0;
}

.hero-section h1 {
    color: var(--dd-white);
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-section p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* Cards and Content Sections */
.card {
    background: var(--dd-white);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--dd-light-gray);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

/* Footer */
.footer {
    background: var(--dd-black);
    color: var(--dd-white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--dd-white);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--dd-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-section h1 {
        font-size: 3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-section {
        padding: 4rem 0;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

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

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Logo Usage - DoorDash Brand Compliance */
.logo-red {
    color: var(--dd-red);
}

.logo-white {
    color: var(--dd-white);
}

/* Dark Background Support */
.dark-bg {
    background: var(--dd-black);
    color: var(--dd-white);
}

.dark-bg h1,
.dark-bg h2,
.dark-bg h3,
.dark-bg h4 {
    color: var(--dd-white);
}

/* Accessibility and Focus States */
a:focus,
button:focus,
.btn:focus {
    outline: 2px solid var(--dd-red);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .hamburger {
        display: none;
    }
    
    body {
        color: var(--dd-black);
        background: var(--dd-white);
    }
}