/* =============================================================================
   main.css - Panthera Pavers Experts
   Global Framework: Variables, Reset, Typography, Header, Footer, Nav, Buttons
   
   Color Strategy: Dark luxury aesthetic with gold accents
   Typography: Playfair Display (headings) + DM Sans (body)
   
   @version 1.0.0
   ============================================================================= */

/* =============================================================================
   CSS VARIABLES
   ============================================================================= */
:root {
    /* ── Brand Colors ── */
    --color-primary: #c9a96e;          /* Gold accent */
    --color-primary-light: #dbb978;    /* Gold hover */
    --color-primary-dark: #a8884f;     /* Gold pressed */
    --color-primary-rgb: 201, 169, 110;
    
    /* ── Dark Palette ── */
    --color-black: #0a0a0a;
    --color-dark: #0d0d0d;
    --color-dark-2: #141414;
    --color-dark-3: #1a1a1a;
    --color-dark-4: #222222;
    --color-dark-5: #2a2a2a;
    --color-dark-border: #333333;
    
    /* ── Light/Text ── */
    --color-white: #ffffff;
    --color-offwhite: #f5f5f0;
    --color-light: #e8e8e3;
    --color-muted: #999999;
    --color-muted-light: #b3b3b3;
    
    /* ── Semantic ── */
    --color-success: #4a9d5b;
    --color-error: #d44638;
    --color-warning: #e8a838;
    
    /* ── Typography ── */
    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --fs-xs: 0.75rem;     /* 12px */
    --fs-sm: 0.875rem;    /* 14px */
    --fs-base: 1rem;      /* 16px */
    --fs-md: 1.125rem;    /* 18px */
    --fs-lg: 1.25rem;     /* 20px */
    --fs-xl: 1.5rem;      /* 24px */
    --fs-2xl: 2rem;       /* 32px */
    --fs-3xl: 2.5rem;     /* 40px */
    --fs-4xl: 3rem;       /* 48px */
    --fs-5xl: 3.5rem;     /* 56px */
    
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;
    
    --lh-tight: 1.2;
    --lh-normal: 1.6;
    --lh-relaxed: 1.8;
    
    /* ── Spacing ── */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* ── Layout ── */
    --container-max: 1280px;
    --container-narrow: 900px;
    --container-wide: 1440px;
    --header-height: 80px;
    --topbar-height: 40px;
    --mobile-bar-height: 64px;
    
    /* ── Effects ── */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
    --shadow-gold: 0 4px 20px rgba(201,169,110,0.25);
    
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* =============================================================================
   RESET & BASE
   ============================================================================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-light);
    background-color: var(--color-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    padding-top: calc(var(--topbar-height) + var(--header-height));
}

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

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

a:hover {
    color: var(--color-primary-light);
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    color: inherit;
}

/* =============================================================================
   TYPOGRAPHY
   ============================================================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    color: var(--color-white);
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

@media (max-width: 768px) {
    h1 { font-size: var(--fs-2xl); }
    h2 { font-size: var(--fs-xl); }
    h3 { font-size: var(--fs-lg); }
}

p {
    margin-bottom: var(--space-md);
    color: var(--color-muted-light);
}

.lead {
    font-size: var(--fs-md);
    line-height: var(--lh-relaxed);
    color: var(--color-light);
}

/* =============================================================================
   LAYOUT
   ============================================================================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    background: var(--color-primary);
    color: var(--color-dark);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    z-index: 10000;
    font-weight: var(--fw-semibold);
}

.skip-link:focus {
    top: var(--space-md);
}

/* =============================================================================
   BUTTONS
   ============================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    text-decoration: none;
    line-height: 1;
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    color: var(--color-dark);
    box-shadow: var(--shadow-gold);
    transform: translateY(-1px);
}

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

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

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

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-dark);
}

.btn-lg {
    padding: 18px 36px;
    font-size: var(--fs-base);
}

.btn-group {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .btn { padding: 12px 24px; font-size: var(--fs-xs); }
    .btn-lg { padding: 14px 28px; font-size: var(--fs-sm); }
    .btn-group { flex-direction: column; }
    .btn-group .btn { width: 100%; justify-content: center; }
}

/* =============================================================================
   TOPBAR
   ============================================================================= */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--topbar-height);
    background: var(--color-black);
    border-bottom: 1px solid var(--color-dark-border);
    z-index: 1001;
    display: flex;
    align-items: center;
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-left,
.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--fs-xs);
    color: var(--color-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a.topbar-item:hover {
    color: var(--color-primary);
}

.topbar-item svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.topbar-divider {
    color: var(--color-dark-border);
    font-size: var(--fs-xs);
}

.topbar-social {
    display: flex;
    gap: var(--space-sm);
}

.topbar-social a {
    color: var(--color-muted);
    transition: color var(--transition-fast);
    display: flex;
}

.topbar-social a:hover {
    color: var(--color-primary);
}

.topbar-social svg {
    width: 14px;
    height: 14px;
}

@media (max-width: 768px) {
    .topbar { display: none; }
    body { padding-top: var(--header-height); }
}

/* =============================================================================
   HEADER
   ============================================================================= */
.header {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--color-dark);
    border-bottom: 1px solid var(--color-dark-border);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
    background: rgba(13,13,13,0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .header {
        top: 0;
        height: 64px;
    }
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.header-logo a {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 44px;
    width: auto;
}

/* Navigation */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-light);
    text-decoration: none;
    transition: color var(--transition-fast);
    letter-spacing: 0.02em;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link svg {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-fast);
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: var(--color-dark-3);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown:hover .nav-link svg {
    transform: rotate(180deg);
}

.nav-dropdown-item {
    display: block;
    padding: 10px 20px;
    font-size: var(--fs-sm);
    color: var(--color-muted-light);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-dropdown-item:hover {
    background: var(--color-dark-4);
    color: var(--color-primary);
    padding-left: 24px;
}

.nav-dropdown-divider {
    height: 1px;
    background: var(--color-dark-border);
    margin: var(--space-xs) 0;
}

.nav-dropdown-all {
    color: var(--color-primary) !important;
}

/* Header CTA */
.header-cta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-light);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    text-decoration: none;
}

.header-phone:hover {
    color: var(--color-primary);
}

.header-phone svg {
    width: 18px;
    height: 18px;
}

.btn-header {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--color-primary);
    color: var(--color-dark);
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-base);
}

.btn-header:hover {
    background: var(--color-primary-light);
    color: var(--color-dark);
    box-shadow: var(--shadow-gold);
}

@media (max-width: 1024px) {
    .header-nav, .header-cta { display: none; }
}

/* =============================================================================
   MOBILE TOGGLE
   ============================================================================= */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-base);
}

@media (max-width: 1024px) {
    .mobile-toggle { display: flex; }
}

/* =============================================================================
   MOBILE NAVIGATION
   ============================================================================= */
.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    height: 100dvh;
    background: var(--color-dark-2);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    transition: right var(--transition-base);
    overflow-y: auto;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-dark-border);
}

.mobile-nav-header img {
    height: 36px;
    width: auto;
}

.mobile-nav-close {
    padding: 8px;
    color: var(--color-muted);
}

.mobile-nav-close svg {
    width: 24px;
    height: 24px;
}

.mobile-nav-menu {
    flex: 1;
    padding: var(--space-md);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    font-size: var(--fs-base);
    color: var(--color-light);
    border-bottom: 1px solid var(--color-dark-4);
    text-decoration: none;
}

.mobile-nav-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.mobile-nav-toggle.active svg {
    transform: rotate(180deg);
}

.mobile-submenu {
    display: none;
    padding-left: var(--space-md);
}

.mobile-submenu.active {
    display: block;
}

.mobile-submenu a {
    display: block;
    padding: 10px 16px;
    font-size: var(--fs-sm);
    color: var(--color-muted-light);
    border-bottom: 1px solid var(--color-dark-5);
    text-decoration: none;
}

.mobile-submenu a:hover {
    color: var(--color-primary);
}

.mobile-nav-cta {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-dark-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
}

.mobile-phone-link {
    font-size: var(--fs-sm);
    color: var(--color-muted);
    text-decoration: none;
}

/* =============================================================================
   MOBILE BOTTOM BAR
   ============================================================================= */
.mobile-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--mobile-bar-height);
    background: var(--color-dark-2);
    border-top: 1px solid var(--color-dark-border);
    z-index: 999;
    align-items: center;
    justify-content: space-around;
    padding: 0 var(--space-md);
    padding-bottom: env(safe-area-inset-bottom, 0);
}

@media (max-width: 768px) {
    .mobile-bottom-bar { display: flex; }
    body { padding-bottom: var(--mobile-bar-height); }
}

.mobile-bottom-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--color-muted);
    font-size: var(--fs-xs);
    transition: color var(--transition-fast);
}

.mobile-bottom-item svg {
    width: 22px;
    height: 22px;
}

.mobile-bottom-item:hover {
    color: var(--color-primary);
}

.mobile-bottom-item.featured {
    color: var(--color-primary);
    position: relative;
}

.mobile-bottom-item.featured::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: 50%;
    z-index: -1;
    box-shadow: var(--shadow-gold);
}

.mobile-bottom-item.featured {
    color: var(--color-dark);
}

.mobile-bottom-item.call-btn {
    color: var(--color-success);
}

/* =============================================================================
   FOOTER
   ============================================================================= */
.footer {
    background: var(--color-black);
    border-top: 1px solid var(--color-dark-border);
}

.footer-main {
    padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: var(--space-2xl);
}

@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
    .footer-grid { grid-template-columns: 1fr; }
    .footer-main { padding: var(--space-2xl) 0; }
}

.footer-logo img {
    height: 44px;
    width: auto;
    margin-bottom: var(--space-md);
}

.footer-tagline {
    font-family: var(--font-heading);
    font-size: var(--fs-sm);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    font-style: italic;
}

.footer-description {
    font-size: var(--fs-sm);
    color: var(--color-muted);
    line-height: var(--lh-relaxed);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark-4);
    border-radius: var(--radius-sm);
    color: var(--color-muted);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: var(--color-dark);
}

.footer-social svg {
    width: 16px;
    height: 16px;
}

.footer-heading {
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: var(--fs-sm);
    color: var(--color-muted);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.footer-link-all {
    color: var(--color-primary) !important;
    font-weight: var(--fw-semibold);
}

.footer-contact-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    text-decoration: none;
    color: inherit;
}

.footer-contact-item svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-label {
    display: block;
    font-size: var(--fs-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    display: block;
    font-size: var(--fs-sm);
    color: var(--color-light);
    font-weight: var(--fw-medium);
}

.footer-cta-btn {
    display: block;
    margin-top: var(--space-lg);
    padding: 12px 24px;
    background: var(--color-primary);
    color: var(--color-dark);
    font-weight: var(--fw-bold);
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: var(--radius-sm);
    text-align: center;
    text-decoration: none;
    transition: all var(--transition-base);
}

.footer-cta-btn:hover {
    background: var(--color-primary-light);
    color: var(--color-dark);
    box-shadow: var(--shadow-gold);
}

/* Footer Trust */
.footer-trust {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-dark-border);
    border-bottom: 1px solid var(--color-dark-border);
}

.trust-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--fs-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.trust-badge svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
}

/* Footer Bottom */
.footer-bottom {
    padding: var(--space-lg) 0;
}

.footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-copyright {
    font-size: var(--fs-xs);
    color: var(--color-muted);
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: var(--space-lg);
}

.footer-legal a {
    font-size: var(--fs-xs);
    color: var(--color-muted);
    text-decoration: none;
}

.footer-legal a:hover {
    color: var(--color-primary);
}

@media (max-width: 640px) {
    .footer-bottom-inner { justify-content: center; text-align: center; }
    .footer-legal { justify-content: center; }
}

/* =============================================================================
   UTILITY CLASSES
   ============================================================================= */
.text-gold { color: var(--color-primary); }
.text-white { color: var(--color-white); }
.text-muted { color: var(--color-muted); }
.text-center { text-align: center; }

.bg-dark { background: var(--color-dark); }
.bg-darker { background: var(--color-dark-2); }
.bg-black { background: var(--color-black); }

.section-padding {
    padding: var(--space-5xl) 0;
}

@media (max-width: 768px) {
    .section-padding { padding: var(--space-3xl) 0; }
}

/* Gold line decoration */
.gold-line {
    width: 60px;
    height: 2px;
    background: var(--color-primary);
}

.gold-line-center {
    margin: var(--space-md) auto;
}