:root {
    --bg-main: #0b0f19;
    --bg-card: rgba(22, 30, 46, 0.85);
    --bg-card-hover: rgba(28, 38, 58, 0.95);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(99, 102, 241, 0.35);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.25);
    --code-bg: #090d16;
    --code-color: #38bdf8;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --glass-backdrop: blur(12px);
    --radius-lg: 16px;
    --radius-md: 12px;
}

[data-bs-theme="light"] {
    --bg-main: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-accent: rgba(99, 102, 241, 0.35);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    --accent-glow: rgba(79, 70, 229, 0.15);
    --code-bg: #1e293b;
    --code-color: #38bdf8;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.25s ease, color 0.25s ease;
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.5px;
    font-size: 1.35rem;
    background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-badge {
    font-size: 0.7rem;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.glass-panel:hover {
    border-color: var(--border-accent);
}

@media (min-width: 992px) {
    .sticky-sidebar {
        position: sticky;
        top: 2rem;
        max-height: calc(100vh - 4rem);
        overflow-y: auto;
        padding-right: 4px;
    }
    
    .sticky-sidebar::-webkit-scrollbar {
        width: 5px;
    }
    .sticky-sidebar::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.15);
        border-radius: 4px;
    }
}

.form-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 0.65rem 0.9rem;
    font-size: 0.925rem;
    transition: all 0.2s ease;
}

[data-bs-theme="light"] .form-control, 
[data-bs-theme="light"] .form-select {
    background-color: #ffffff;
}

.form-control:focus, .form-select:focus {
    background-color: transparent;
    border-color: var(--accent-color);
    color: var(--text-primary);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.form-check-input {
    background-color: rgba(0, 0, 0, 0.2);
    border-color: var(--border-color);
}

.form-check-input:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-accent {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    color: #ffffff;
    border: none;
    font-weight: 600;
    border-radius: var(--radius-md);
    padding: 0.6rem 1.2rem;
    box-shadow: 0 4px 14px var(--accent-glow);
    transition: all 0.2s ease;
}

.btn-accent:hover {
    background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--accent-glow);
}

.btn-outline-glass {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.btn-outline-glass:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.output-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.output-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.3);
}

.card-header-custom {
    padding: 1rem 1.25rem;
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title-text {
    font-weight: 600;
    font-size: 1.05rem;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.code-wrapper {
    position: relative;
    background-color: var(--code-bg);
}

.code-block {
    margin: 0;
    padding: 1.25rem;
    color: var(--code-color);
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    overflow-x: auto;
}

.btn-copy-card {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    font-size: 0.8rem;
    padding: 0.3rem 0.7rem;
    border-radius: 8px;
    opacity: 0.85;
    transition: all 0.2s ease;
    z-index: 5;
}

.btn-copy-card:hover {
    opacity: 1;
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #ffffff;
}

.accordion-custom .accordion-button {
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.75rem 1rem;
    border: none;
    box-shadow: none;
}

.accordion-custom .accordion-button:not(.collapsed) {
    color: var(--accent-color);
    background-color: rgba(99, 102, 241, 0.05);
}

.accordion-custom .accordion-body {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.9rem 1rem;
    line-height: 1.6;
}

#qrcodeCanvas canvas, #qrcodeCanvas img {
    margin: 0 auto;
    border-radius: 12px;
    padding: 12px;
    background: #ffffff;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.toast-container {
    z-index: 1090;
}

footer {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}