/* ============================================
   RICARICA-ILIAD.IT — Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-primary: #CA191C;
    --color-primary-dark: #A01517;
    --color-primary-light: #E8383B;
    --color-black: #1A1A1A;
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E0E0E0;
    --color-gray-300: #BDBDBD;
    --color-gray-500: #757575;
    --color-gray-700: #424242;
    --color-green: #28A745;
    --color-green-light: #D4EDDA;
    --color-orange: #FD7E14;
    --color-orange-light: #FFF3CD;
    --color-blue: #007BFF;
    --color-blue-light: #CCE5FF;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    --max-width: 1200px;
    --header-height: 70px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-regular);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

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

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.875rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.625rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-gray-700);
}

.text-small {
    font-size: 0.875rem;
    font-weight: var(--font-light);
}

.text-meta {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    font-weight: var(--font-light);
}

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

/* --- Header --- */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-white);
    border-bottom: 2px solid var(--color-primary);
    height: var(--header-height);
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: var(--font-bold);
    font-size: 1.25rem;
    color: var(--color-black);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: var(--font-bold);
    font-size: 1.1rem;
}

.logo span {
    color: var(--color-primary);
}

/* --- Navigation --- */
.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav a {
    padding: 8px 14px;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    transition: var(--transition);
    white-space: nowrap;
}

.nav a:hover,
.nav a.active {
    color: var(--color-primary);
    background: rgba(202, 25, 28, 0.06);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-black);
    margin: 6px 0;
    transition: var(--transition);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* --- Disclaimer Banner --- */
.disclaimer-banner {
    background: var(--color-gray-100);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 8px 0;
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

/* --- Hero Section --- */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

.hero h1 {
    color: var(--color-white);
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.hero p {
    color: rgba(255,255,255,0.9);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 1;
}

.hero-cta {
    display: inline-flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
    z-index: 1;
}

/* --- Page Header (inner pages) --- */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 50px 0 40px;
    text-align: center;
}

.page-header h1 {
    color: var(--color-white);
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
}

.page-header p {
    color: rgba(255,255,255,0.85);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
    padding: 15px 0;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: 4px;
}

.breadcrumbs li:not(:last-child)::after {
    content: '›';
    color: var(--color-gray-300);
    margin-left: 4px;
}

.breadcrumbs a {
    color: var(--color-gray-500);
}

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

.breadcrumbs .current {
    color: var(--color-black);
    font-weight: var(--font-medium);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: var(--font-semibold);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
}

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

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

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

.btn-white:hover {
    background: var(--color-gray-100);
    color: var(--color-primary-dark);
}

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
}

/* --- Section --- */
.section {
    padding: 60px 0;
}

.section-alt {
    background: var(--color-gray-100);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    margin-bottom: 0.5rem;
}

.section-title p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-gray-500);
}

/* --- Cards --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.card-icon {
    width: 52px;
    height: 52px;
    background: rgba(202, 25, 28, 0.08);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--color-primary);
}

.card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.card p {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    margin-bottom: 1rem;
}

.card-link {
    font-size: 0.9rem;
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.card-link::after {
    content: '→';
    transition: var(--transition);
}

.card:hover .card-link::after {
    transform: translateX(4px);
}

/* --- Content Area --- */
.content {
    padding: 40px 0 60px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
    align-items: start;
}

.content-main {
    min-width: 0;
}

.content-main h2 {
    margin-top: 2.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-gray-200);
}

.content-main h2:first-child {
    margin-top: 0;
}

.content-main h3 {
    margin-top: 1.5rem;
}

.content-main ul,
.content-main ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.content-main ul {
    list-style: disc;
}

.content-main ol {
    list-style: decimal;
}

.content-main li {
    margin-bottom: 0.5rem;
    color: var(--color-gray-700);
}

/* --- Sidebar --- */
.sidebar {
    position: sticky;
    top: calc(var(--header-height) + 20px);
}

.sidebar-widget {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.sidebar-widget h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}

.sidebar-widget ul {
    list-style: none;
    padding: 0;
}

.sidebar-widget li {
    margin-bottom: 0;
}

.sidebar-widget li a {
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--color-gray-700);
}

.sidebar-widget li a:hover {
    background: rgba(202, 25, 28, 0.06);
    color: var(--color-primary);
}

/* --- Steps (HowTo) --- */
.steps {
    counter-reset: step;
    margin: 2rem 0;
}

.step {
    counter-increment: step;
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    padding: 24px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
}

.step::before {
    content: counter(step);
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    font-size: 1.1rem;
}

.step-content h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.step-content p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* --- Tables --- */
.table-responsive {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-gray-200);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

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

th {
    padding: 14px 16px;
    text-align: left;
    font-weight: var(--font-semibold);
    white-space: nowrap;
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-gray-200);
    color: var(--color-gray-700);
}

tbody tr:hover {
    background: rgba(202, 25, 28, 0.03);
}

tbody tr:last-child td {
    border-bottom: none;
}

.price-highlight {
    font-weight: var(--font-bold);
    color: var(--color-primary);
    font-size: 1.1em;
}

/* --- Info Boxes --- */
.info-box {
    padding: 20px 24px;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    border-left: 4px solid;
}

.info-box p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.info-box-title {
    font-weight: var(--font-semibold);
    margin-bottom: 4px;
    display: block;
}

.info-box.info {
    background: var(--color-blue-light);
    border-color: var(--color-blue);
}

.info-box.warning {
    background: var(--color-orange-light);
    border-color: var(--color-orange);
}

.info-box.success {
    background: var(--color-green-light);
    border-color: var(--color-green);
}

.info-box.danger {
    background: #F8D7DA;
    border-color: var(--color-primary);
}

/* --- Tool Containers --- */
.tool-container {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin: 2rem 0;
}

.tool-container h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-gray-200);
}

.tool-container h3 .tool-icon {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    flex-shrink: 0;
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: var(--font-semibold);
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--color-black);
}

.form-group select,
.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"] {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--color-black);
    background: var(--color-white);
    transition: var(--transition);
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(202, 25, 28, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* --- Tool Results --- */
.tool-result {
    background: var(--color-gray-50);
    border: 2px solid var(--color-green);
    border-radius: var(--border-radius);
    padding: 20px 24px;
    margin-top: 1.5rem;
    display: none;
}

.tool-result.visible {
    display: block;
    animation: fadeIn 0.3s ease;
}

.tool-result h4 {
    color: var(--color-green);
    margin-bottom: 0.75rem;
}

.tool-result .result-value {
    font-size: 2rem;
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.tool-result .result-detail {
    font-size: 0.9rem;
    color: var(--color-gray-500);
}

/* --- Troubleshooter --- */
.troubleshooter-step {
    display: none;
    animation: fadeIn 0.3s ease;
}

.troubleshooter-step.active {
    display: block;
}

.troubleshooter-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 1rem;
}

.troubleshooter-option {
    padding: 14px 20px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--color-white);
    text-align: left;
    font-family: var(--font-family);
}

.troubleshooter-option:hover {
    border-color: var(--color-primary);
    background: rgba(202, 25, 28, 0.03);
}

.troubleshooter-solution {
    background: var(--color-green-light);
    border: 2px solid var(--color-green);
    border-radius: var(--border-radius);
    padding: 20px 24px;
}

.troubleshooter-solution h4 {
    color: var(--color-green);
    margin-bottom: 0.5rem;
}

.troubleshooter-back {
    margin-top: 1rem;
    cursor: pointer;
    color: var(--color-primary);
    font-weight: var(--font-semibold);
    font-size: 0.9rem;
    background: none;
    border: none;
    font-family: var(--font-family);
}

/* --- Plan Comparison Cards --- */
.plan-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 1.5rem 0;
}

.plan-card {
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
    background: var(--color-white);
    cursor: pointer;
}

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

.plan-card.selected {
    background: rgba(202, 25, 28, 0.03);
}

.plan-card .plan-name {
    font-weight: var(--font-bold);
    font-size: 1rem;
    margin-bottom: 8px;
}

.plan-card .plan-price {
    font-size: 2rem;
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.plan-card .plan-price span {
    font-size: 0.9rem;
    font-weight: var(--font-regular);
    color: var(--color-gray-500);
}

.plan-card .plan-data {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    margin-top: 4px;
}

.plan-card .plan-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: var(--font-semibold);
    margin-top: 8px;
}

.badge-4g {
    background: var(--color-blue-light);
    color: var(--color-blue);
}

.badge-5g {
    background: var(--color-green-light);
    color: var(--color-green);
}

/* --- FAQ Accordion --- */
.faq-list {
    margin: 2rem 0;
}

.faq-item {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 18px 24px;
    background: var(--color-white);
    border: none;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: var(--font-semibold);
    color: var(--color-black);
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-primary);
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 16px;
}

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

.faq-item.active .faq-question {
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-200);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 18px 24px;
    max-height: 500px;
}

.faq-answer p {
    font-size: 0.95rem;
}

/* --- Comparison Toggle Buttons --- */
.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.filter-btn {
    padding: 8px 18px;
    border: 2px solid var(--color-gray-200);
    border-radius: 25px;
    background: var(--color-white);
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.85rem;
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(202, 25, 28, 0.04);
}

/* --- Quick Links Grid --- */
.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
    margin: 1.5rem 0;
}

.quick-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    color: var(--color-black);
    transition: var(--transition);
}

.quick-link:hover {
    border-color: var(--color-primary);
    background: rgba(202, 25, 28, 0.03);
    color: var(--color-primary);
}

.quick-link-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* --- Footer --- */
.footer {
    background: var(--color-black);
    color: var(--color-gray-300);
    padding: 50px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: 1.25rem;
}

.footer p {
    color: var(--color-gray-300);
    font-size: 0.9rem;
    line-height: 1.6;
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--color-gray-300);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-disclaimer {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-gray-500);
    line-height: 1.6;
}

.footer-disclaimer strong {
    color: var(--color-gray-300);
}

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

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

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

    .hero {
        padding: 50px 0;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .page-header {
        padding: 35px 0 30px;
    }

    .page-header h1 {
        font-size: 1.75rem;
    }

    .section {
        padding: 40px 0;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        padding: 80px 20px 20px;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
        gap: 2px;
        overflow-y: auto;
        z-index: 1000;
    }

    .nav.open {
        right: 0;
    }

    .nav a {
        width: 100%;
        padding: 12px 16px;
    }

    .nav-toggle {
        display: block;
    }

    .nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }

    .nav-overlay.visible {
        display: block;
    }

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

    .plan-cards {
        grid-template-columns: 1fr 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .table-responsive {
        font-size: 0.85rem;
    }

    th, td {
        padding: 10px 12px;
    }

    .tool-container {
        padding: 20px;
    }

    .step {
        padding: 16px;
        gap: 14px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .plan-cards {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-lg {
        padding: 14px 24px;
    }
}

/* --- Utility Classes --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   EXTRA TOOLS — Additional Components
   ============================================ */

/* --- Bar Chart (horizontal) --- */
.bar-chart {
    margin: 1.5rem 0;
}

.bar-chart-item {
    margin-bottom: 12px;
}

.bar-chart-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-bottom: 4px;
    font-weight: var(--font-medium);
}

.bar-chart-label .bar-value {
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.bar-chart-track {
    width: 100%;
    height: 28px;
    background: var(--color-gray-100);
    border-radius: 14px;
    overflow: hidden;
    position: relative;
}

.bar-chart-fill {
    height: 100%;
    border-radius: 14px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transition: width 0.6s ease;
    min-width: 2px;
}

.bar-chart-fill.green {
    background: linear-gradient(90deg, var(--color-green), #5BD47B);
}

.bar-chart-fill.blue {
    background: linear-gradient(90deg, var(--color-blue), #4DA3FF);
}

.bar-chart-fill.orange {
    background: linear-gradient(90deg, var(--color-orange), #FFA64D);
}

/* --- Progress Bar --- */
.progress-container {
    margin: 1.5rem 0;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-bottom: 6px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: var(--color-gray-200);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    border-radius: 10px;
    transition: width 0.6s ease;
}

.progress-fill.safe { background: var(--color-green); }
.progress-fill.warning { background: var(--color-orange); }
.progress-fill.danger { background: var(--color-primary); }

.progress-markers {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin-top: 4px;
}

/* --- Letter/Text Output --- */
.letter-output {
    width: 100%;
    min-height: 300px;
    padding: 24px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-black);
    background: var(--color-gray-50);
    resize: vertical;
}

.letter-output:focus {
    outline: none;
    border-color: var(--color-primary);
}

.letter-actions {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

/* --- Speed Result Grid --- */
.speed-result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 1.5rem 0;
}

.speed-card {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
}

.speed-card-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.speed-card-name {
    font-size: 0.85rem;
    color: var(--color-gray-500);
    margin-bottom: 4px;
}

.speed-card-size {
    font-size: 0.8rem;
    color: var(--color-gray-300);
    margin-bottom: 8px;
}

.speed-card-time {
    font-size: 1.25rem;
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

/* --- Range Slider --- */
.range-group {
    margin-bottom: 1.25rem;
}

.range-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: var(--font-semibold);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.range-value {
    font-weight: var(--font-bold);
    color: var(--color-primary);
    font-size: 1rem;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: 4px;
    outline: none;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid var(--color-white);
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid var(--color-white);
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* --- Activity Grid (for data consumption) --- */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin: 1rem 0;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    background: var(--color-white);
}

.activity-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    text-align: center;
}

.activity-info {
    flex: 1;
    min-width: 0;
}

.activity-info label {
    display: block;
    font-weight: var(--font-semibold);
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.activity-info .activity-rate {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

.activity-input {
    width: 70px;
    flex-shrink: 0;
}

.activity-input input {
    width: 100%;
    padding: 8px 10px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 0.9rem;
    text-align: center;
    color: var(--color-black);
}

.activity-input input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.activity-input span {
    display: block;
    font-size: 0.7rem;
    color: var(--color-gray-500);
    text-align: center;
    margin-top: 2px;
}

/* --- Operator Badge --- */
.operator-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: var(--font-semibold);
}

.badge-mno {
    background: rgba(202, 25, 28, 0.08);
    color: var(--color-primary);
}

.badge-mvno {
    background: var(--color-blue-light);
    color: var(--color-blue);
}

/* --- Results List --- */
.results-list {
    margin: 1rem 0;
}

.results-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    margin-bottom: 8px;
    background: var(--color-white);
    transition: var(--transition);
}

.results-list-item:hover {
    border-color: var(--color-primary);
}

.results-list-item .item-operator {
    font-weight: var(--font-semibold);
}

.results-list-item .item-plan {
    font-size: 0.85rem;
    color: var(--color-gray-500);
}

.results-list-item .item-price {
    font-weight: var(--font-bold);
    color: var(--color-primary);
    font-size: 1.1rem;
}

.results-list-item .item-savings {
    font-size: 0.8rem;
    color: var(--color-green);
    font-weight: var(--font-semibold);
}

/* --- Coverage Grid --- */
.coverage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin: 1rem 0;
}

.coverage-card {
    padding: 16px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

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

.coverage-card h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.coverage-card .coverage-link {
    font-size: 0.8rem;
    margin-top: 8px;
    display: inline-block;
}

/* --- IBAN Display --- */
.iban-display {
    font-family: 'Courier New', monospace;
    font-size: 1.3rem;
    font-weight: var(--font-bold);
    letter-spacing: 3px;
    padding: 16px 20px;
    background: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    text-align: center;
    margin: 1rem 0;
    word-break: break-all;
}

.iban-display.valid {
    border-color: var(--color-green);
    color: var(--color-green);
}

.iban-display.invalid {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.iban-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 1rem 0;
}

.iban-detail-item {
    padding: 12px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius);
}

.iban-detail-item label {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    display: block;
    margin-bottom: 2px;
}

.iban-detail-item span {
    font-weight: var(--font-semibold);
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .activity-grid {
        grid-template-columns: 1fr;
    }

    .speed-result-grid {
        grid-template-columns: 1fr 1fr;
    }

    .iban-details {
        grid-template-columns: 1fr;
    }

    .iban-display {
        font-size: 1rem;
        letter-spacing: 2px;
    }

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