/**
 * Primary Stylesheet for the-prava.sbs
 * Light theme, accredited driving school / official transport licensing center style
 * Strictly adheres to 8 responsive & anti-overflow rules.
 */

:root {
    /* Brand Color Palette */
    --color-primary: #1e3a8a;       /* Deep Navy */
    --color-primary-dark: #172554;  /* Midnight */
    --color-primary-light: #2563eb; /* Vibrant Blue */
    --color-primary-subtle: #eff6ff;/* Soft Ice Blue */
    
    --color-accent: #d97706;        /* Traffic Amber */
    --color-accent-hover: #b45309;  /* Dark Amber */
    --color-accent-subtle: #fef3c7; /* Soft Amber */

    --color-success: #059669;       /* Verified Green */
    --color-success-subtle: #ecfdf5;/* Soft Green */

    --color-surface: #ffffff;       /* Pure Card White */
    --color-surface-alt: #f8fafc;   /* Slate Background */
    --color-surface-hover: #f1f5f9; /* Slate 100 */

    --color-border: #e2e8f0;        /* Slate 200 */
    --color-border-strong: #cbd5e1; /* Slate 300 */

    --color-text-main: #0f172a;     /* Slate 900 */
    --color-text-muted: #475569;    /* Slate 600 */
    --color-text-light: #64748b;    /* Slate 500 */
    --color-text-inverse: #ffffff;  /* White */

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Spacing & Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);

    /* Max widths */
    --container-max-width: 1240px;
}

/* 1. Global Reset & Overflow Rules */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    min-width: 0; /* Ensures CSS Grid children can shrink properly */
}

html {
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    overflow-wrap: break-word;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    color: var(--color-text-main);
    background-color: var(--color-surface-alt);
    overflow-x: hidden;
    overflow-wrap: break-word;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 2. Container Wrapping Rules */
.site-container,
.wrap,
.content-layout,
.site-main-wrap {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
    overflow-x: hidden;
}

.site-main-wrap {
    flex: 1 0 auto;
}

/* Skip Link */
.skip-navigation {
    position: absolute;
    top: -100px;
    left: 20px;
    background: var(--color-primary);
    color: #ffffff;
    padding: 10px 16px;
    z-index: 9999;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
}
.skip-navigation:focus {
    top: 20px;
}

/* Links & Media Base */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
a:hover {
    color: var(--color-primary-light);
}
img, svg, video {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Buttons */
.btn-primary-header,
.btn-primary-action,
.btn-secondary-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 700;
    text-align: center;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary-header {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    padding: 9px 20px;
    font-size: 0.9rem;
    box-shadow: 0 2px 4px rgba(217, 119, 6, 0.25);
}
.btn-primary-header:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-text-inverse);
    transform: translateY(-1px);
}

.btn-primary-action {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 10px rgba(217, 119, 6, 0.3);
}
.btn-primary-action:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-text-inverse);
    transform: translateY(-1px);
}

.btn-secondary-action {
    background-color: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-border-strong);
}
.btn-secondary-action:hover {
    background-color: var(--color-primary-subtle);
    border-color: var(--color-primary-light);
}

.btn-full-width {
    width: 100%;
}

/* Badges & Pills */
.badge-trust,
.badge-tag,
.badge-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}
.badge-trust {
    background-color: var(--color-success-subtle);
    color: var(--color-success);
    border: 1px solid rgba(5, 150, 105, 0.2);
}
.badge-tag {
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    border: 1px solid rgba(30, 58, 138, 0.15);
}

/* ==========================================================================
   Top Notification Bar
   ========================================================================== */
.site-topbar {
    background-color: var(--color-primary-dark);
    color: #e2e8f0;
    font-size: 0.82rem;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.topbar-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.topbar-info {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}
.topbar-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background-color: rgba(5, 150, 105, 0.2);
    color: #34d399;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}
.topbar-note {
    color: #93c5fd;
    font-weight: 500;
}
.topbar-hours {
    color: #cbd5e1;
}
.topbar-contacts {
    display: flex;
    align-items: center;
    gap: 12px;
}
.topbar-link {
    color: #f1f5f9;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}
.topbar-link:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
}
.topbar-wa {
    color: #4ade80;
}
.topbar-tg {
    color: #38bdf8;
}

/* ==========================================================================
   Main Header & Navigation
   ========================================================================== */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}
.header-layout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Logo */
.site-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--color-primary-dark);
}
.brand-badge-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 6px rgba(30, 58, 138, 0.3);
}
.brand-text {
    display: flex;
    flex-direction: column;
}
.brand-title {
    font-size: 1.25rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--color-primary-dark);
    line-height: 1.1;
}
.brand-dot {
    color: var(--color-accent);
}
.brand-subtitle {
    font-size: 0.72rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

/* Desktop Menu */
.desktop-navigation {
    display: block;
}
.nav-menu-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 4px;
}
.nav-item {
    position: relative;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 12px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-text-main);
    border-radius: var(--radius-sm);
}
.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
}
.dropdown-chevron {
    transition: transform 0.2s ease;
}
.has-dropdown:hover .dropdown-chevron {
    transform: rotate(180deg);
}

/* Dropdown Panel */
.dropdown-panel {
    position: absolute;
    top: 100%;
    left: 0;
    width: 290px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: 1010;
}
.has-dropdown:hover .dropdown-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-menu {
    list-style: none;
}
.dropdown-link {
    display: block;
    padding: 8px 16px;
    text-decoration: none;
}
.dropdown-link:hover {
    background-color: var(--color-surface-hover);
}
.dropdown-title {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-text-main);
}
.dropdown-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-light);
    line-height: 1.3;
    margin-top: 2px;
}

/* Header Actions */
.header-action-group {
    display: flex;
    align-items: center;
    gap: 12px;
}
.mobile-menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--color-border);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
}
.hamburger-bar {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text-main);
    border-radius: 2px;
    transition: 0.2s;
}

/* ==========================================================================
   Mobile Drawer
   ========================================================================== */
.mobile-nav-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2000;
    display: none;
}
.mobile-nav-drawer.open {
    display: block;
}
.drawer-backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(2px);
}
.drawer-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100%;
    background-color: var(--color-surface);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}
.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--color-border);
}
.drawer-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary-dark);
}
.drawer-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: var(--color-text-muted);
    cursor: pointer;
}
.drawer-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.drawer-nav-section {
    margin-bottom: 16px;
}
.drawer-heading {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: 8px;
}
.drawer-links-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.drawer-links-list a {
    display: block;
    padding: 8px 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-main);
    border-radius: var(--radius-sm);
}
.drawer-links-list a:hover {
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
}
.drawer-contacts-block {
    margin-top: auto;
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.drawer-contact-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.drawer-contact-item {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-main);
}
.drawer-security-note {
    font-size: 0.78rem;
    color: var(--color-text-light);
    line-height: 1.4;
}

/* ==========================================================================
   Breadcrumbs Bar
   ========================================================================== */
.breadcrumbs-bar {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
}
.breadcrumbs-list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    font-size: 0.85rem;
}
.breadcrumb-node {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.breadcrumb-anchor {
    color: var(--color-text-muted);
}
.breadcrumb-anchor:hover {
    color: var(--color-primary);
    text-decoration: underline;
}
.breadcrumb-divider {
    color: var(--color-border-strong);
}
.breadcrumb-text {
    color: var(--color-text-main);
    font-weight: 600;
}

/* ==========================================================================
   Hero Section & Layouts
   ========================================================================== */
.hero-section {
    background: linear-gradient(180deg, #ffffff 0%, var(--color-surface-alt) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: 48px 0 40px;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: center;
}
.hero-grid > * {
    min-width: 0;
}

.hero-badge-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.hero-h1 {
    font-size: 2.35rem;
    font-weight: 900;
    line-height: 1.2;
    color: var(--color-primary-dark);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}
.hero-lead-text {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 24px;
}
.hero-cta-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}
.hero-key-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
}
.hero-key-facts > * {
    min-width: 0;
}
.fact-item {
    display: flex;
    flex-direction: column;
}
.fact-value {
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--color-primary);
}
.fact-label {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.3;
}

/* Hero Media Box */
.hero-visual-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    position: relative;
}
.hero-image {
    border-radius: var(--radius-lg);
    width: 100%;
    height: 320px;
    object-fit: cover;
}
.hero-verification-stamp {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin-top: 12px;
    box-shadow: var(--shadow-sm);
}
.stamp-icon {
    color: var(--color-success);
    flex-shrink: 0;
}
.stamp-text {
    font-size: 0.84rem;
    color: var(--color-text-main);
    line-height: 1.4;
}

/* ==========================================================================
   Section Containers & Titles
   ========================================================================== */
.site-section {
    padding: 56px 0;
}
.site-section-alt {
    background-color: #ffffff;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 36px;
}
.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--color-primary-light);
    margin-bottom: 8px;
}
.section-title {
    font-size: 1.95rem;
    font-weight: 900;
    color: var(--color-primary-dark);
    line-height: 1.25;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.section-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Cards Grid (Categories, Services, Steps)
   ========================================================================== */
.cards-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.cards-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.cards-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.cards-grid-4 > *,
.cards-grid-3 > *,
.cards-grid-2 > * {
    min-width: 0;
}

/* Category Card */
.category-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    text-decoration: none;
    color: inherit;
}
.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}
.category-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.cat-badge-letter {
    width: 44px;
    height: 44px;
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    font-size: 1.3rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}
.cat-price-tag {
    font-size: 0.92rem;
    font-weight: 800;
    color: var(--color-accent-hover);
    background-color: var(--color-accent-subtle);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}
.category-card-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}
.category-card-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: 16px;
    flex-grow: 1;
}
.category-card-footer {
    border-top: 1px solid var(--color-border);
    padding-top: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* Service Card */
.service-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.service-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}
.service-card-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}
.service-card-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: 14px;
    flex-grow: 1;
}
.service-card-term {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Step Card (No generic 01/02 decoration) */
.process-step-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}
.step-stage-name {
    font-size: 0.78rem;
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: 6px;
}
.step-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}
.step-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ==========================================================================
   Interactive Calculator Section
   ========================================================================== */
.calculator-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
}
.calculator-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 36px;
}
.calculator-grid > * {
    min-width: 0;
}
.calc-field-group {
    margin-bottom: 20px;
}
.calc-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 8px;
}
.calc-options-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}
.calc-options-row > * {
    min-width: 0;
}
.calc-option-btn {
    background-color: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px 8px;
    text-align: center;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-text-main);
    transition: all 0.15s ease;
}
.calc-option-btn.selected,
.calc-option-btn:hover {
    background-color: var(--color-primary-subtle);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

.calc-checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background-color: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 600;
}
.calc-checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

/* Calculator Result Panel */
.calc-result-panel {
    background-color: var(--color-primary-dark);
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.result-head-title {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: #ffffff;
}
.result-breakdown {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
    font-size: 0.88rem;
    color: #cbd5e1;
}
.result-breakdown li {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 6px;
}
.calc-total-box {
    border-top: 2px solid rgba(255, 255, 255, 0.2);
    padding-top: 16px;
    margin-bottom: 20px;
}
.calc-total-label {
    font-size: 0.85rem;
    color: #93c5fd;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.calc-total-value {
    font-size: 2.2rem;
    font-weight: 900;
    color: #f59e0b;
}

/* ==========================================================================
   Article Content & Rich Text (Rules 4, 7, 8)
   ========================================================================== */
.article-container {
    padding: 40px 0 60px;
}
.article-layout-grid {
    display: grid;
    grid-template-columns: 2.8fr 1.2fr;
    gap: 40px;
    align-items: start;
}
.article-layout-grid > *,
.layout__main,
.layout__side,
.layout__main > *,
.layout__side > * {
    min-width: 0;
}

.article-header {
    margin-bottom: 28px;
}
.article-h1 {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--color-primary-dark);
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}
.article-meta-row {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.85rem;
    color: var(--color-text-light);
    flex-wrap: wrap;
}

/* Rich Text & Typography */
.content-article,
.rt,
.article-body {
    overflow-x: hidden;
    overflow-wrap: break-word;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-main);
}
.content-article p,
.content-p {
    margin-bottom: 1.25rem;
}
.content-h2 {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--color-primary-dark);
    margin-top: 2.2rem;
    margin-bottom: 1rem;
    line-height: 1.3;
    letter-spacing: -0.01em;
}
.content-h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-top: 1.6rem;
    margin-bottom: 0.75rem;
    line-height: 1.35;
}
.content-quote {
    background-color: var(--color-primary-subtle);
    border-left: 4px solid var(--color-primary);
    padding: 16px 20px;
    margin: 1.5rem 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-primary-dark);
}
.content-list,
.content-ordered-list {
    margin: 1rem 0 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.content-divider {
    border: 0;
    height: 1px;
    background-color: var(--color-border);
    margin: 2.5rem 0;
}

/* Scheme Code Box */
.scheme-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 1.5rem 0;
    overflow-x: auto;
}
.scheme-code {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--color-primary-dark);
    white-space: pre;
    line-height: 1.4;
}

/* 7. Tables wrapped with overflow rules */
.table-wrap {
    width: 100%;
    margin: 1.5rem 0;
    overflow-x: hidden;
}
.table-scroll {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
}
.content-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.92rem;
}
.content-table th,
.content-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
}
.content-table thead th {
    background-color: var(--color-surface-hover);
    color: var(--color-primary-dark);
    font-weight: 800;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.content-table tbody tr:last-child td {
    border-bottom: none;
}
.content-table tbody tr:hover {
    background-color: var(--color-primary-subtle);
}

/* Table of Contents */
.toc-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 24px;
}
.toc-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
}
.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.toc-list a {
    font-size: 0.88rem;
    color: var(--color-text-muted);
}
.toc-list a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 1.5rem;
    margin-bottom: 2rem;
}
.faq-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}
.faq-card[open] {
    border-color: var(--color-primary-light);
}
.faq-head {
    padding: 16px 20px;
    font-weight: 700;
    font-size: 1.02rem;
    color: var(--color-primary-dark);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    user-select: none;
}
.faq-head::-webkit-details-marker {
    display: none;
}
.faq-toggle-icon {
    transition: transform 0.2s ease;
    color: var(--color-text-light);
    flex-shrink: 0;
}
.faq-card[open] .faq-toggle-icon {
    transform: rotate(180deg);
    color: var(--color-primary);
}
.faq-body {
    padding: 0 20px 18px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   E-E-A-T Author Card
   ========================================================================== */
.expert-author-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 24px;
    display: flex;
    gap: 20px;
    margin: 2.5rem 0;
    box-shadow: var(--shadow-sm);
}
.expert-photo-wrap {
    flex-shrink: 0;
}
.expert-photo {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    border: 2px solid var(--color-primary-subtle);
}
.expert-details {
    display: flex;
    flex-direction: column;
}
.expert-badge-verified {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-success);
    margin-bottom: 4px;
}
.expert-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 2px;
}
.expert-role {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
}
.expert-summary {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.45;
    margin-bottom: 12px;
}
.expert-links-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.btn-expert-contact {
    font-size: 0.85rem;
    font-weight: 700;
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
}
.btn-expert-contact:hover {
    background-color: var(--color-primary);
    color: #ffffff;
}
.expert-more-anchor {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-muted);
}

/* ==========================================================================
   CTA Banner & Lead Forms
   ========================================================================== */
.cta-banner {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1e293b 100%);
    border-radius: var(--radius-xl);
    padding: 40px;
    color: #ffffff;
    margin: 40px 0;
    box-shadow: var(--shadow-lg);
}
.cta-banner-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 36px;
    align-items: center;
}
.cta-banner-content > * {
    min-width: 0;
}
.cta-title {
    font-size: 1.85rem;
    font-weight: 900;
    line-height: 1.25;
    margin: 12px 0 14px;
    color: #ffffff;
}
.cta-desc {
    font-size: 0.98rem;
    color: #cbd5e1;
    line-height: 1.55;
    margin-bottom: 20px;
}
.cta-advantages-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 0.9rem;
    color: #f1f5f9;
}
.cta-advantages-list li {
    display: flex;
    align-items: center;
    gap: 10px;
}
.check-icon {
    color: #34d399;
    flex-shrink: 0;
}

/* Lead Form Card (Solid background per Rule 5) */
.lead-card-form {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    color: var(--color-text-main);
}
.form-header-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 16px;
    text-align: center;
}
.form-row {
    margin-bottom: 14px;
}
.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 6px;
}
.form-input-control {
    width: 100%;
    padding: 11px 14px;
    font-family: var(--font-family);
    font-size: 0.95rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background-color: #ffffff;
    color: var(--color-text-main);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-input-control:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.form-legal-notice {
    font-size: 0.74rem;
    color: var(--color-text-light);
    line-height: 1.4;
    margin-top: 10px;
    text-align: center;
}

/* ==========================================================================
   Sidebar Widgets
   ========================================================================== */
.sidebar-stack {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.sidebar-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}
.sidebar-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 14px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
}
.sidebar-links-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.sidebar-links-list a {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sidebar-links-list a:hover {
    color: var(--color-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: var(--color-primary-dark);
    color: #cbd5e1;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
    padding-top: 56px;
}
.footer-content-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1.2fr;
    gap: 32px;
    margin-bottom: 40px;
}
.footer-content-grid > * {
    min-width: 0;
}

.footer-logo-title {
    font-size: 1.35rem;
    font-weight: 900;
    color: #ffffff;
    letter-spacing: -0.02em;
}
.footer-dot {
    color: var(--color-accent);
}
.footer-brand-text {
    font-size: 0.85rem;
    line-height: 1.55;
    margin: 14px 0 16px;
    color: #94a3b8;
}
.footer-security-highlight {
    display: flex;
    gap: 10px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px;
    border-radius: var(--radius-md);
}
.sec-badge-icon {
    color: #34d399;
    flex-shrink: 0;
}
.sec-badge-text {
    font-size: 0.78rem;
    line-height: 1.4;
    color: #e2e8f0;
}
.footer-heading {
    font-size: 0.95rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 14px;
}
.footer-links-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.footer-links-list a {
    color: #94a3b8;
    font-size: 0.86rem;
}
.footer-links-list a:hover {
    color: #ffffff;
}

/* Contact Badges */
.footer-contact-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.footer-contact-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background-color: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: 0.84rem;
    font-weight: 600;
    text-decoration: none;
}
.footer-contact-badge:hover {
    background-color: rgba(255, 255, 255, 0.14);
    color: #ffffff;
}

.footer-bottom-strip {
    background-color: #0b1120;
    padding: 16px 0;
    font-size: 0.8rem;
    color: #64748b;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.footer-bottom-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.footer-legal-links {
    display: flex;
    gap: 16px;
}
.footer-legal-links a {
    color: #94a3b8;
}
.footer-legal-links a:hover {
    color: #ffffff;
}

/* Sticky Mobile CTA Bar */
.sticky-mobile-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 10px 16px;
    z-index: 990;
    display: none;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.08);
}
.sticky-mobile-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto;
}
.btn-mobile-wa,
.btn-mobile-tg {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: #ffffff;
    flex-shrink: 0;
}
.btn-mobile-wa {
    background-color: #25d366;
}
.btn-mobile-tg {
    background-color: #229ed9;
}
.btn-mobile-buy {
    flex: 1;
    background-color: var(--color-accent);
    color: #ffffff;
    font-weight: 800;
    font-size: 1rem;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    text-decoration: none;
}

/* ==========================================================================
   Responsive Media Queries (320px, 375px, 425px, 768px, 1024px, 1440px)
   ========================================================================== */

@media (max-width: 1024px) {
    .desktop-navigation {
        display: none;
    }
    .mobile-menu-toggle {
        display: flex;
    }
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .hero-visual-card {
        max-width: 600px;
        margin: 0 auto;
    }
    .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .cards-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .article-layout-grid {
        grid-template-columns: 1fr;
    }
    .cta-banner-content {
        grid-template-columns: 1fr;
    }
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    /* 6. Convert flex rows to column */
    .topbar-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .topbar-contacts {
        flex-wrap: wrap;
        width: 100%;
    }
    .hero-h1 {
        font-size: 1.75rem;
    }
    .hero-cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-key-facts {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .cards-grid-4,
    .cards-grid-3,
    .cards-grid-2 {
        grid-template-columns: 1fr;
    }
    .footer-content-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom-flex {
        flex-direction: column;
        text-align: center;
    }
    .expert-author-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .expert-links-row {
        justify-content: center;
    }
    .calc-options-row {
        grid-template-columns: repeat(2, 1fr);
    }
    .sticky-mobile-cta {
        display: block;
    }
    body {
        padding-bottom: 64px; /* Space for sticky CTA */
    }
}

@media (max-width: 425px) {
    .site-container {
        padding-left: 14px;
        padding-right: 14px;
    }
    .hero-h1 {
        font-size: 1.5rem;
    }
    .section-title {
        font-size: 1.55rem;
    }
    .cta-banner {
        padding: 24px 16px;
    }
    .calculator-box {
        padding: 20px 14px;
    }
}

@media (max-width: 375px) {
    .brand-title {
        font-size: 1.1rem;
    }
    .brand-badge-icon {
        width: 38px;
        height: 38px;
    }
    .hero-h1 {
        font-size: 1.35rem;
    }
    .calc-options-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 320px) {
    .site-container {
        padding-left: 10px;
        padding-right: 10px;
    }
    .hero-h1 {
        font-size: 1.25rem;
    }
}