:root {
    --bg-dark: #030712;
    --card-bg: rgba(17, 24, 39, 0.9);
    --neon: #00f2ff;
    --text-main: #f3f4f6;
    --text-dim: #9ca3af;
    --border: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
    --bg-dark: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.95);
    --neon: #0ea5e9;
    --text-main: #1e293b;
    --text-dim: #64748b;
    --border: rgba(0, 0, 0, 0.1);
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    transition: background 0.3s ease, color 0.3s ease;
}

.how-to-card {
    max-width: 600px !important; 
    padding: 40px !important;
}

.instruction-list {
    display: flex;
    flex-direction: column;
    gap: 25px; 
    margin-top: 10px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.2s ease;
}
.step-item:hover {
    background: rgba(0, 242, 255, 0.05);
    border-color: var(--neon);
}

.step-num {
    background: var(--neon);
    color: #030712;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
    font-size: 1rem;
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.3);
}
.step-text {
    line-height: 1.6; 
    font-size: 0.95rem;
    color: var(--text-main);
}
.step-text strong {
    color: var(--neon);
    display: block;
    margin-bottom: 4px;
    font-size: 1.05rem;
}

.step-item p {
    margin: 0;
    line-height: 1.5;
    font-size: 0.95rem;
}

.logo-hover-effect {
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.logo-hover-effect:hover {
    transform: scale(1.05);
    color: var(--neon);
    text-shadow: 0 0 15px var(--neon), 0 0 30px rgba(0, 242, 255, 0.2);
}

.nav-logo { 
    font-weight: 700;
    color: var(--neon);
    font-size: 1.7rem;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.logo-brackets {
    display: inline-block;
    color: var(--neon);
    font-size: 2rem;
    transition: transform 0.3s ease;
}

.site-logo {
    height: 50px;
    width: 50px;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid var(--neon);
    transition: filter 0.4s ease, transform 0.4s ease;
}

.logo-hover-effect:hover .site-logo {
    filter: drop-shadow(0 0 8px var(--neon));
}

.logo-hover-effect:hover .logo-brackets {
    transform: translateX(-5px) rotate(-10deg);
}

.version-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.03);
    padding: 4px;
    border-radius: 14px;
    border: 1px solid var(--border);
    gap: 4px;
    margin: 0 15px;
    backdrop-filter: blur(5px);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    padding: 8px 18px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    position: relative;
}

.tab-btn.active {
    background: var(--neon);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.4);
}

.tab-btn:hover:not(.active) {
    background: rgba(0, 242, 255, 0.1);
    color: var(--neon);
}

.animate-btn {
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.animate-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0, 242, 255, 0.2);
    filter: brightness(1.2);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    z-index: 5000;
    display: none;
    align-items: center;
    justify-content: center;
}

.overlay-content {
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border);
    padding: 30px;
}

.overlay-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 2rem;
    cursor: pointer;
}

.overlay-course-item {
    padding: 15px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    margin-bottom: 10px;
    border: 1px solid var(--border);
    transition: border-color 0.3s ease;
}

.overlay-course-item:hover {
    border-color: var(--neon);
}

.nav-btn-link {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    white-space: nowrap;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 2000;
    padding: 10px 40px;
    border-radius: 0 0 20px 20px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-stats {
    display: flex;
    gap: 10px;
    align-items: center;
}

.stat-badge {
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 15px;
    border-radius: 12px;
    font-size: 0.85rem;
    border: 1px solid var(--border);
    white-space: nowrap;
}

.neon-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 10%, #00f2ff08 0%, transparent 40%);
    z-index: -1;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--neon);
    color: #000;
    padding: 12px 25px;
    border-radius: 12px;
    font-weight: 800;
    box-shadow: 0 10px 30px rgba(0, 242, 255, 0.3);
    z-index: 3000;
    transform: translateX(200%);
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.toast.show {
    transform: translateX(0);
}

.app-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 25px;
    padding: 30px;
    box-sizing: border-box;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 100px;
    height: auto;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    z-index: 1000;
    scrollbar-width: thin;
    scrollbar-color: var(--neon) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--neon);
    border-radius: 10px;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 4px;
}

td {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 12px;
    border: 1px solid var(--border);
    transition: 0.2s;
    text-align: center;
}

.slot {
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
}

.slot:hover {
    border-color: var(--neon);
    background: rgba(0, 242, 255, 0.05);
}

.selected-temp {
    border-color: var(--neon);
    background: rgba(0, 242, 255, 0.1);
    box-shadow: 0 0 10px var(--neon);
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 25px;
}

.section-heading {
    color: var(--neon);
    margin-bottom: 20px;
    font-weight: 700;
    font-size: 1.2rem;
}

.section-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

#courseSearch {
    width: 300px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    padding: 10px;
    border-radius: 10px;
    color: var(--text-main);
}

.field {
    margin-bottom: 17px;
}

.field label {
    display: block;
    font-size: 1rem;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 8px;
}

input,
select,
textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: 10px;
    color: var(--text-main);
    outline: none;
    box-sizing: border-box;
}

select option {
    background-color: #111827;
    color: #ffffff;
}

[data-theme="light"] select option {
    background-color: #ffffff;
    color: #1e293b;
}

[data-theme="light"] textarea,
[data-theme="light"] input {
    background: #fff;
    color: #000;
}

.btn-icon {
    background: none;
    border: 1px solid var(--border);
    cursor: pointer;
    font-size: 1.2rem;
    border-radius: 10px;
    padding: 5px 10px;
    color: var(--text-main);
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-neon {
    background: var(--neon);
    color: #000;
    border: none;
    padding: 15px;
    border-radius: 12px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
    display: block;
    width: 100%;
}

.btn-neon:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 242, 255, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    margin-bottom: 3px;
    transition: 0.3s;
    display: block; 
    width: 100%;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #ef4444;
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: 0.3s;
    margin-bottom: 10px;
    margin-top: 5px; 
    width: 100%;
}

.btn-danger:hover {
    background: #ef4444;
    color: white;
    transform: scale(1.02);
}

.action-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    transition: transform 0.2s;
}

.action-btn:hover {
    transform: scale(1.2);
}

.edit-icon {
    color: var(--neon);
    margin-right: 8px;
}

.delete-icon {
    color: #ef4444;
}

.full-width {
    width: 100%;
}

.color-swatch {
    width: 40px;
    height: 20px;
    border-radius: 10px;
    display: block;
    margin: 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-share-vibrant {
    background-color: #7c3aed;
    color: white !important;
    border: none;
    font-weight: 800;
    padding: 14px;
    border-radius: 12px;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
    margin-bottom: 10px;
    transition: background 0.2s ease;
}

.btn-share-vibrant:hover {
    background-color: #6d28d9;
    transform: scale(1.01);
}

.footer {
    margin: 40px 30px 20px 30px;
    padding: 50px 40px !important;
    border-radius: 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
}

.footer-col h4 {
    color: var(--neon);
    font-size: 1.2rem;
    margin-bottom: 25px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-col p {
    color: var(--text-dim);
    line-height: 1.6;
    font-size: 0.95rem;
    margin-top: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    color: var(--text-main);
    font-size: 0.95rem;
}

.contact-item i {
    color: var(--neon);
    width: 20px;
    text-align: center;
}

.contact-item a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s;
}

.contact-item a:hover {
    color: var(--neon);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.social-btn {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-main);
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.social-btn:hover {
    transform: translateY(-5px) scale(1.1);
    color: #000;
}

.social-btn.github:hover { 
    background: #fff; 
    box-shadow: 0 0 15px #fff; 
}

.social-btn.linkedin:hover { 
    background: #0077b5; 
    border-color: #0077b5; 
    box-shadow: 0 0 15px #0077b5; 
}

.social-btn.instagram:hover { 
    background: #e4405f; 
    border-color: #e4405f; 
    box-shadow: 0 0 15px #e4405f;
}
 
.social-btn.youtube:hover { 
    background: #ff0000; 
    border-color: #ff0000; 
    box-shadow: 0 0 15px #ff0000; 
}

.copyright {
    font-size: 0.8rem !important;
    opacity: 0.6;
    margin-top: 30px !important;
}

.made-with {
    font-weight: 600;
    color: var(--text-main) !important;
}

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .contact-item {
        justify-content: center;
    }
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 1200px) {
    .nav-container {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    .version-tabs {
        margin: 5px;
    }
}

@media (max-width: 1024px) {
    .app-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
        max-height: none;
    }
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }
}
@media print {
    .navbar, 
    .sidebar, 
    .footer, 
    .toast, 
    .action-section, 
    .section-header-flex, 
    #themeToggle,
    .nav-actions,
    .version-tabs {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
    }

    .app-layout {
        display: block !important;
        padding: 0 !important;
    }

    .main-content {
        width: 100% !important;
    }

    .glass-card {
        background: transparent !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
    }

    table {
        border-collapse: collapse !important;
        width: 100% !important;
    }

    td, th {
        border: 1px solid #000 !important;
        color: #000 !important;
        background: transparent !important;
    }

    .slot[style*="background-color"] {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
        border: 1px solid #000 !important;
    }

    .section-heading {
        color: #000 !important;
        text-align: center;
        margin-bottom: 20px;
    }
}