/* Tech-Minimalism Design: Dark Blue/Gray + Neon Accent */
:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #141b3d;
    --bg-card: #1a2342;
    --text-primary: #e8eaf6;
    --text-secondary: #b0b8d4;
    --accent-neon: #00d9ff;
    --accent-hover: #00b8e6;
    --border-color: #2a3a5a;
    --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header & Navigation */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-neon);
    text-decoration: none;
    text-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
    transition: all 0.3s ease;
    display: inline-block;
}

.logo:hover {
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.8);
    color: var(--accent-hover);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
    position: relative;
    padding-bottom: 2px;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-neon);
    transition: width 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--accent-neon);
}

.nav-menu a:hover::after,
.nav-menu a:focus::after {
    width: 100%;
}

.nav-menu a.active {
    color: var(--accent-neon);
}

.nav-menu a.active::after {
    width: 100%;
}

.burger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    position: relative;
    width: 25px;
    height: 20px;
}

.burger span {
    width: 25px;
    height: 2px;
    background: var(--accent-neon);
    transition: all 0.3s ease;
    position: absolute;
}

.burger span:nth-child(1) {
    top: 0;
}

.burger span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.burger span:nth-child(3) {
    bottom: 0;
}

.burger.active span:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

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

.burger.active span:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-radius: 10px;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-neon);
    text-shadow: 0 0 15px rgba(0, 217, 255, 0.4);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Device Cards */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.device-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.device-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-neon);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.device-card:hover::before {
    transform: scaleX(1);
}

.device-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--accent-neon);
}

.device-card h3 {
    color: var(--accent-neon);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.device-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* Tables */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
    display: table;
}

.info-table th,
.info-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    word-wrap: break-word;
}

.info-table th {
    background: var(--bg-secondary);
    color: var(--accent-neon);
    font-weight: 600;
}

.info-table tr:hover {
    background: var(--bg-secondary);
}

.info-table td:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsive table wrapper */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 2rem 0;
}

.table-wrapper table {
    min-width: 600px;
}

/* Sections */
section {
    margin: 3rem 0;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

section h2 {
    color: var(--accent-neon);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    border-bottom: 2px solid var(--accent-neon);
    padding-bottom: 0.5rem;
}

section h3 {
    color: var(--accent-neon);
    margin: 1.5rem 0 1rem;
    font-size: 1.3rem;
}

section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

section ul,
section ol {
    margin: 1rem 0;
    padding-left: 2rem;
    color: var(--text-secondary);
}

section li {
    margin: 0.5rem 0;
}

/* CSS Static Diagrams */
.diagram {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.diagram-box {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 2px dashed var(--accent-neon);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-neon);
    font-size: 1.1rem;
    position: relative;
}

.diagram-box::before {
    content: '📡';
    font-size: 3rem;
    opacity: 0.3;
    position: absolute;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img:hover {
    transform: scale(1.02);
    box-shadow: 0 5px 15px rgba(0, 217, 255, 0.2);
}

/* Forms */
form {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

form label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

form input[type="text"],
form input[type="email"],
form input[type="tel"],
form textarea {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
}

form input:focus,
form textarea:focus {
    outline: 2px solid var(--accent-neon);
    outline-offset: 2px;
    border-color: var(--accent-neon);
}

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

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 1.5rem 0;
}

.checkbox-group input[type="checkbox"] {
    margin-top: 0.3rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-group label {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn {
    background: var(--accent-neon);
    color: var(--bg-primary);
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

.btn:hover,
.btn:focus {
    background: var(--accent-hover);
    box-shadow: var(--shadow-glow);
    outline: 2px solid var(--accent-neon);
    outline-offset: 2px;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 2px solid var(--accent-neon);
    padding: 1.5rem;
    z-index: 2000;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.5);
    display: none;
}

.cookie-banner.active {
    display: block;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.cookie-text {
    flex: 1;
    min-width: 300px;
    color: var(--text-secondary);
}

.cookie-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cookie-btn {
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--accent-neon);
    border-radius: 5px;
    background: transparent;
    color: var(--accent-neon);
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s;
    flex: 1;
    min-width: 120px;
}

.cookie-btn:hover,
.cookie-btn:focus {
    background: var(--accent-neon);
    color: var(--bg-primary);
    outline: 2px solid var(--accent-neon);
    outline-offset: 2px;
}

.cookie-btn.accept {
    background: var(--accent-neon);
    color: var(--bg-primary);
}

.cookie-btn.accept:hover {
    background: var(--accent-hover);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    padding: 3rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    color: var(--accent-neon);
    margin-bottom: 1rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin: 0.5rem 0;
    transition: color 0.3s;
    position: relative;
    padding-bottom: 2px;
    width: fit-content;
}

.footer-section a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-neon);
    transition: width 0.3s ease;
}

.footer-section a:hover,
.footer-section a:focus {
    color: var(--accent-neon);
}

.footer-section a:hover::after,
.footer-section a:focus::after {
    width: 100%;
}

.footer-section a.active {
    color: var(--accent-neon);
}

.footer-section a.active::after {
    width: 100%;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--bg-secondary);
        width: 100%;
        padding: 2rem;
        transition: left 0.3s;
        border-top: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .burger {
        display: flex;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

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

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

    main {
        padding: 1rem;
    }

    .cookie-content {
        flex-direction: column;
    }

    .cookie-buttons {
        width: 100%;
    }

    .cookie-btn {
        flex: 1;
    }

    /* Responsive images in grid layouts */
    section > div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }

    /* Responsive tables - horizontal scroll */
    .table-wrapper {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 2rem 0;
    }

    .table-wrapper .info-table {
        min-width: 600px;
        display: table;
        width: 100%;
    }

    .info-table th,
    .info-table td {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

/* Focus States */
*:focus-visible {
    outline: 2px solid var(--accent-neon);
    outline-offset: 2px;
}

/* Remove outline for header and footer links, use underline instead */
.nav-menu a:focus-visible,
.footer-section a:focus-visible {
    outline: none;
}

.nav-menu a:focus-visible::after,
.footer-section a:focus-visible::after {
    width: 100%;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.highlight {
    color: var(--accent-neon);
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    max-width: 400px;
    word-wrap: break-word;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    border-left: 4px solid var(--accent-neon);
}

.toast.error {
    border-left: 4px solid #ff4444;
    color: #ff4444;
}

@media (max-width: 768px) {
    .toast {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        max-width: none;
    }
}