/**
 * Repair Pro - Main Stylesheet
 * Professional blue + orange color scheme
 */

/* ================================
   CSS Variables
   ================================ */
:root {
    /* Primary Colors */
    --primary: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;

    /* Accent Colors */
    --accent: #f97316;
    --accent-dark: #ea580c;
    --accent-light: #fb923c;

    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Semantic Colors */
    --success: #22c55e;
    --warning: #eab308;
    --error: #ef4444;
    --info: #3b82f6;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --section-padding: 80px;
    --section-padding-mobile: 48px;

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

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition: 0.2s ease;
}

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

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

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

p {
    margin-bottom: 1rem;
}

/* ================================
   Layout
   ================================ */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

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

.grid {
    display: grid;
    gap: 24px;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid--2, .grid--3, .grid--4 {
        grid-template-columns: 1fr;
    }
}

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition);
    white-space: nowrap;
}

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

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

.btn--accent {
    background: var(--accent);
    color: #fff;
}

.btn--accent:hover {
    background: var(--accent-dark);
    color: #fff;
}

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

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

.btn--lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn--sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

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

/* ================================
   Header
   ================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

.header__logo {
    flex-shrink: 0;
}

.logo__text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.logo__accent {
    color: var(--accent);
}

.header__nav {
    flex: 1;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__link {
    font-weight: 500;
    color: var(--gray-700);
    transition: color var(--transition);
}

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

.header__cta {
    flex-shrink: 0;
}

.header__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.header__burger span {
    width: 24px;
    height: 2px;
    background: var(--gray-800);
    transition: all var(--transition);
}

@media (max-width: 900px) {
    .header__nav {
        display: none;
    }

    .header__cta {
        display: none;
    }

    .header__burger {
        display: flex;
    }
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 99;
    padding: 24px;
    display: none;
}

.mobile-menu.is-active {
    display: block;
}

.mobile-menu__nav {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-menu__link {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--gray-800);
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
}

.mobile-menu__link--accent {
    color: var(--accent);
}

/* ================================
   Breadcrumbs
   ================================ */
.breadcrumbs-wrapper {
    background: var(--gray-50);
    padding: 16px 0;
    border-bottom: 1px solid var(--gray-100);
}

.breadcrumbs__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
}

.breadcrumbs__item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumbs__item:not(:last-child)::after {
    content: '/';
    color: var(--gray-400);
}

.breadcrumbs__link {
    color: var(--gray-600);
}

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

.breadcrumbs__current {
    color: var(--gray-800);
    font-weight: 500;
}

/* ================================
   Hero Section
   ================================ */
.hero {
    background: linear-gradient(135deg, var(--primary-50) 0%, #fff 100%);
    padding: 80px 0;
}

.hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero__content {
    max-width: 540px;
}

.hero__title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero__title span {
    color: var(--accent);
}

.hero__text {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 32px;
}

.hero__buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero__image {
    display: flex;
    justify-content: center;
}

.hero__calculator {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
}

.hero__calculator-title {
    font-size: 1.25rem;
    margin-bottom: 24px;
    text-align: center;
}

@media (max-width: 900px) {
    .hero__inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__content {
        max-width: none;
    }

    .hero__title {
        font-size: 2.25rem;
    }

    .hero__buttons {
        justify-content: center;
    }

    .hero__calculator {
        margin: 0 auto;
    }
}

/* ================================
   Cards
   ================================ */
.card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.card--bordered {
    border: 1px solid var(--gray-200);
}

.card--shadow {
    box-shadow: var(--shadow);
}

.card__image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.card:hover .card__image img {
    transform: scale(1.05);
}

.card__body {
    padding: 24px;
}

.card__category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    margin-bottom: 8px;
}

.card__title {
    font-size: 1.125rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.card__title a {
    color: var(--gray-900);
}

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

.card__excerpt {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: 16px;
}

.card__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Calculator Card */
.calculator-card {
    background: #fff;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all var(--transition);
}

.calculator-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.calculator-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    border-radius: var(--radius);
    color: var(--primary);
}

.calculator-card__icon svg {
    width: 32px;
    height: 32px;
}

.calculator-icon {
    color: var(--primary);
}

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

.calculator-card__title {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.calculator-card__desc {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ================================
   Section Titles
   ================================ */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header--left {
    text-align: left;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ================================
   Form Elements
   ================================ */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: #fff;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    font-size: 0.875rem;
    color: var(--error);
    margin-top: 4px;
}

.form-hint {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 4px;
}

/* ================================
   Calculator Form
   ================================ */
.calc-form {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
}

.calc-form__title {
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 24px;
}

.calc-result {
    background: var(--primary-50);
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    margin-top: 24px;
}

.calc-result__label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 8px;
}

.calc-result__value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.calc-result__note {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 8px;
}

/* ================================
   Article Content
   ================================ */
.article {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 0;
}

.article__header {
    margin-bottom: 32px;
}

.article__title {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.article__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.9375rem;
    color: var(--gray-500);
}

.article__image {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article__content {
    font-size: 1.0625rem;
    line-height: 1.8;
}

.article__content h2 {
    font-size: 1.75rem;
    margin-top: 48px;
    margin-bottom: 16px;
}

.article__content h3 {
    font-size: 1.375rem;
    margin-top: 32px;
    margin-bottom: 12px;
}

.article__content p {
    margin-bottom: 20px;
}

.article__content ul,
.article__content ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.article__content li {
    margin-bottom: 8px;
}

.article__content ul li {
    list-style-type: disc;
}

.article__content ol li {
    list-style-type: decimal;
}

.article__content img {
    border-radius: var(--radius);
    margin: 24px 0;
}

.article__content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 24px;
    margin: 24px 0;
    font-style: italic;
    color: var(--gray-600);
}

.article__content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.article__content th,
.article__content td {
    padding: 12px;
    border: 1px solid var(--gray-200);
    text-align: left;
}

.article__content th {
    background: var(--gray-50);
    font-weight: 600;
}

/* ================================
   Tags
   ================================ */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-block;
    padding: 6px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-50);
    border-radius: 100px;
    transition: all var(--transition);
}

.tag:hover {
    background: var(--primary);
    color: #fff;
}

/* ================================
   FAQ Section
   ================================ */
.faq-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: background var(--transition);
}

.faq-question:hover {
    background: var(--gray-50);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    flex-shrink: 0;
}

.faq-item.is-open .faq-question::after {
    content: '−';
}

.faq-answer {
    padding: 0 24px 20px;
    display: none;
    color: var(--gray-600);
    line-height: 1.7;
}

.faq-item.is-open .faq-answer {
    display: block;
}

/* ================================
   Sidebar
   ================================ */
.sidebar {
    position: sticky;
    top: 100px;
}

.sidebar__widget {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.sidebar__title {
    font-size: 1.125rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gray-100);
}

.sidebar__list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar__link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--gray-700);
    transition: color var(--transition);
}

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

/* ================================
   Pagination
   ================================ */
.pagination {
    margin-top: 48px;
}

.pagination__list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.pagination__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    font-weight: 500;
    color: var(--gray-700);
    background: #fff;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.pagination__link:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination__link--active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.pagination__link--active:hover {
    color: #fff;
}

.pagination__ellipsis {
    padding: 0 8px;
    color: var(--gray-400);
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 64px 0 0;
}

.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer__logo {
    margin-bottom: 16px;
    display: inline-block;
}

.footer__logo .logo__text {
    color: #fff;
}

.footer__desc {
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 280px;
}

.footer__title {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer__links a {
    color: var(--gray-400);
    font-size: 0.9375rem;
    transition: color var(--transition);
}

.footer__links a:hover {
    color: #fff;
}

.footer__bottom {
    border-top: 1px solid var(--gray-800);
    margin-top: 48px;
    padding: 24px 0;
    text-align: center;
}

.footer__copy {
    font-size: 0.875rem;
    color: var(--gray-500);
}

@media (max-width: 900px) {
    .footer__inner {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .footer__inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* ================================
   404 Page
   ================================ */
.error-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 0;
}

.error-page__code {
    font-size: 8rem;
    font-weight: 700;
    color: var(--gray-200);
    line-height: 1;
    margin-bottom: 16px;
}

.error-page__title {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.error-page__text {
    color: var(--gray-600);
    margin-bottom: 32px;
}

/* ================================
   Utilities
   ================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

.hidden { display: none !important; }

@media (max-width: 768px) {
    .hidden-mobile { display: none !important; }
}

@media (min-width: 769px) {
    .hidden-desktop { display: none !important; }
}