/* ============================================
   RYD Cars - Design System & Stylesheet
   Mobile-First, Trust-Focused Design
   ============================================ */

/* === Google Fonts for Odia Language === */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Oriya:wght@400;600;700&display=swap');

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans Oriya', -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* === Design Tokens === */
:root {
    /* Colors */
    --color-primary: #1e3a8a;
    /* Deep navy blue - trust & stability */
    --color-primary-dark: #1e293b;
    /* Darker blue for hover states */
    --color-primary-light: #3b82f6;
    /* Lighter blue for accents */
    --color-accent: #f97316;
    /* Orange - subtle highlights only */
    --color-accent-hover: #ea580c;
    /* Darker orange for hover */
    --color-success: #059669;
    /* Green for WhatsApp */
    --color-success-hover: #047857;
    /* Darker green for hover */
    --color-text: #1f2937;
    /* Primary text */
    --color-text-light: #6b7280;
    /* Secondary text */
    --color-border: #e5e7eb;
    /* Borders */
    --color-bg-light: #f9fafb;
    /* Light background */
    --color-white: #ffffff;

    /* Spacing */
    --spacing-xs: 0.5rem;
    /* 8px */
    --spacing-sm: 1rem;
    /* 16px */
    --spacing-md: 1.5rem;
    /* 24px */
    --spacing-lg: 2rem;
    /* 32px */
    --spacing-xl: 3rem;
    /* 48px */
    --spacing-2xl: 4rem;
    /* 64px */
    --spacing-3xl: 6rem;
    /* 96px */

    /* Typography */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 1.875rem;
    /* 30px */
    --font-size-4xl: 2.25rem;
    /* 36px */

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

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-base: 150ms ease-in-out;
}

/* === Layout Components === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

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

/* === Navigation === */
.header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    height: 50px;
    width: auto;
}

.nav-toggle {
    display: block;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    list-style: none;
}

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

.nav-menu li {
    border-bottom: 1px solid var(--color-border);
}

.nav-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-base);
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: var(--color-bg-light);
    color: var(--color-primary);
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        box-shadow: none;
        gap: var(--spacing-md);
    }

    .nav-menu li {
        border: none;
    }

    .nav-menu a {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .nav-menu a:hover {
        background-color: transparent;
        color: var(--color-primary);
    }
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

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

.text-large {
    font-size: var(--font-size-lg);
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-light);
}

.tagline {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-accent);
    margin-top: var(--spacing-sm);
}

/* Hero Text (on dark background) */
.section-hero h1 {
    color: var(--color-white);
    font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-4xl));
    margin-bottom: var(--spacing-md);
}

.section-hero p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-lg);
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
}

.section-hero .tagline {
    color: var(--color-accent);
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    /* Touch-friendly */
    line-height: 1.5;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-whatsapp:hover {
    background-color: var(--color-success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-whatsapp::before {
    content: "💬 ";
    margin-right: var(--spacing-xs);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    display: block;
    width: 100%;
}

/* === Cards === */
.card {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    height: 100%;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.card-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
    display: block;
}

.card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.card-notice {
    background-color: var(--color-bg-light);
    border-left: 4px solid var(--color-accent);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.card-notice h4 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

/* === Grid Layouts === */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: 1fr;
}

.grid-3 {
    grid-template-columns: 1fr;
}

.grid-4 {
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* === Process Steps === */
.steps {
    display: grid;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.step-content h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

@media (min-width: 768px) {
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .steps {
        grid-template-columns: repeat(4, 1fr);
    }

    .step {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
}

/* === Lists === */
.checklist {
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.checklist li {
    padding: var(--spacing-sm) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.checklist li::before {
    content: "✓";
    color: var(--color-success);
    font-weight: 700;
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.rules-list {
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.rules-list li {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background-color: var(--color-bg-light);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
}

.rules-list li strong {
    color: var(--color-primary);
}

/* === Footer === */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-3xl);
}

.footer-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-tagline {
    color: var(--color-accent);
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* === Embedded Content === */
.embed-container {
    position: relative;
    width: 100%;
    padding-bottom: 75%;
    /* 4:3 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.embed-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* === Utility Classes === */
.mt-0 {
    margin-top: 0;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.max-w-2xl {
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
}

.max-w-3xl {
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
}

/* === Responsive Typography === */
@media (min-width: 768px) {
    h1 {
        font-size: var(--font-size-4xl);
    }

    h2 {
        font-size: var(--font-size-3xl);
    }
}

/* === Accessibility === */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus states for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* === Odia Language Support === */
.odia {
    font-family: 'Noto Sans Oriya', sans-serif;
    font-weight: 600;
}

.bilingual {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.bilingual .odia {
    font-size: 0.9em;
    color: var(--color-text-light);
}