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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --dark-secondary: #1e293b;
    --dark-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.8rem;
}

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

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #6366f1, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* About Section */
.about {
    padding: 120px 20px 80px;
    background: var(--dark-bg);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content > p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.9;
    text-align: justify;
}

.project-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: var(--dark-secondary);
    border-radius: 15px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.feature-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--text-secondary);
}

/* Components Section */
.components {
    padding: 80px 20px;
    background: var(--dark-secondary);
}

.components-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.component-card {
    background: var(--dark-bg);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.component-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.3);
    border-color: var(--primary-color);
}

.component-image {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.component-image i {
    font-size: 2.5rem;
    color: white;
}

.component-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--primary-color);
}

.component-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.component-details {
    background: var(--dark-secondary);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.component-details p {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.component-details ul {
    list-style: none;
    padding-left: 0;
}

.component-details li {
    color: var(--text-secondary);
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.component-details li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.component-qty {
    display: block;
    text-align: center;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
    padding: 0.6rem 1rem;
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.buy-link {
    display: block;
    text-align: center;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.buy-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.5);
}

/* Code Section */
.code-section {
    padding: 80px 20px;
    background: var(--dark-bg);
}

.code-explanation {
    background: var(--dark-secondary);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 3rem;
    border-left: 4px solid var(--primary-color);
}

.code-explanation h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.code-explanation h3 i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.explanation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.explain-item strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.explain-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.code-container {
    background: var(--dark-secondary);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid rgba(99, 102, 241, 0.3);
    margin-bottom: 3rem;
}

.code-header {
    background: var(--dark-tertiary);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    cursor: pointer;
    transition: background 0.3s;
}

.code-header:hover {
    background: rgba(51, 65, 85, 0.8);
}

.code-header span {
    color: var(--text-primary);
    font-weight: 600;
}

.code-header span i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.toggle-code-btn {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.code-content {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 2000px;
    }
}

.code-actions {
    padding: 1rem 1.5rem;
    background: var(--dark-tertiary);
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    display: flex;
    justify-content: flex-end;
}

.copy-btn {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border: none;
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.copy-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.4);
}

.code-container pre {
    margin: 0;
    padding: 2rem;
    overflow-x: auto;
}

.code-container code {
    color: #a5d6ff;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.7;
}

.upload-instructions {
    background: var(--dark-secondary);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
}

.upload-instructions h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.upload-instructions h3 i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.upload-instructions ol {
    padding-left: 1.5rem;
}

.upload-instructions li {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.upload-instructions strong {
    color: var(--primary-color);
}

.circuit-note {
    background: rgba(236, 72, 153, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    border-radius: 10px;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.circuit-note i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-top: 0.2rem;
}

.circuit-note strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.circuit-note ul {
    list-style: none;
    padding-left: 0;
}

.circuit-note li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.7;
}

.circuit-note li::before {
    content: '⚡';
    position: absolute;
    left: 0;
}

/* QR Code Section */
.qr-section {
    padding: 80px 20px;
    background: var(--dark-secondary);
}

.qr-container {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
}

.qr-box {
    background: var(--dark-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 2px solid var(--primary-color);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
    text-align: center;
    max-width: 450px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.qr-box:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(99, 102, 241, 0.4);
}

.qr-code-image {
    width: 300px;
    height: 300px;
    border-radius: 15px;
    background: white;
    padding: 10px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.qr-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.qr-info i {
    font-size: 2rem;
    color: var(--primary-color);
}

.qr-url {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    word-break: break-all;
    margin: 0;
}

.download-qr-btn {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
    margin-top: 1rem;
}

.download-qr-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.5);
}

/* Footer */
.footer {
    background: var(--dark-secondary);
    padding: 2rem 20px;
    text-align: center;
    border-top: 1px solid var(--dark-tertiary);
}

.footer p {
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }

    .nav-menu {
        gap: 1rem;
    }

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

.project-features {
        grid-template-columns: 1fr;
    }

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

    .code-container code {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.8rem;
    }

    .nav-brand span {
        font-size: 1.2rem;
    }

    .nav-menu {
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        padding: 1rem;
        display: none;
    }

    .about {
        padding-top: 100px;
    }

    .qr-box {
        padding: 2rem;
    }

    .qr-code-image {
        width: 250px;
        height: 250px;
    }
}