:root {
    --bg-dark: #0f111a;
    --sidebar-bg: #161925;
    --primary: #c084fc;
    --primary-glow: rgba(192, 132, 252, 0.4);
    --secondary: #22d3ee;
    --secondary-glow: rgba(34, 211, 238, 0.4);
    --accent: #f472b6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --error: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    min-height: 100vh;
    display: flex;
    overflow: hidden;
}

.glow-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--primary-glow) 0%, rgba(0, 0, 0, 0) 70%);
    filter: blur(120px);
    z-index: -1;
    opacity: 0.3;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 2rem;
    text-align: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.logo span {
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary-glow);
}

.sidebar-nav {
    flex-grow: 1;
    padding: 1rem;
}

.nav-btn {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 1rem;
    text-align: left;
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.nav-btn:hover {
    background: var(--glass-bg);
    color: var(--text-main);
}

.nav-btn.active {
    background: var(--glass-bg);
    color: var(--primary);
    box-shadow: inset 4px 0 0 var(--primary);
}

.sidebar-footer {
    padding: 1.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

/* Content Area */
.content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 2rem;
    position: relative;
}

.view {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-header {
    margin-bottom: 2rem;
}

.view-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

.view-header h1 span {
    color: var(--primary);
}

.view-header p {
    color: var(--text-muted);
}

/* Glass Components */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Lab Layouts */
.lab-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 1100px) {
    .lab-layout {
        grid-template-columns: 1fr;
    }
}

.input-group {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

input,
textarea,
select {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 0.8rem;
    color: white;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
}

.dual-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #a855f7);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), #06b6d4);
    color: white;
}

.btn-ghost {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
}

.btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

/* Switch Toggle */
.debug-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .4s;
    border: 1px solid var(--glass-border);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--primary);
}

input:checked+.slider:before {
    transform: translateX(20px);
}

.slider.round {
    border-radius: 24px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Canvas */
.canvas-container {
    background: rgba(0, 0, 0, 0.4);
    border-radius: 12px;
    height: 300px;
    position: relative;
    overflow: hidden;
}

#main-canvas {
    width: 100%;
    height: 100%;
}

/* Stego specific */
.stego-layout {
    display: grid;
    gap: 1.5rem;
}

.stego-controls {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    margin-top: 1rem;
}

.dual-btns {
    display: flex;
    gap: 0.5rem;
}

/* Analysis Grid */
.analysis-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.results-box {
    background: rgba(0, 0, 0, 0.4);
    padding: 1rem;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    min-height: 100px;
}

/* Utilities */
.alert {
    padding: 1rem;
    border-radius: 10px;
    margin-top: 1rem;
    border: 1px solid;
}

.warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--warning);
    color: var(--warning);
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transform: translateY(100px);
    transition: transform 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
    z-index: 1000;
}

.toast.active {
    transform: translateY(0);
}

.mt-1 {
    margin-top: 1rem;
}

.p-2 {
    padding: 2rem;
}

.small {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.chart-container {
    height: 200px;
    display: flex;
    align-items: flex-end;
    gap: 2px;
}

.bar {
    flex: 1;
    background: var(--secondary);
    transition: height 0.5s ease;
}