:root {
    --bg-main: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2a2a2a;
    
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    
    --glass-bg: rgba(30, 30, 30, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    --terminal-bg: #0a0a0a;
    --terminal-text: #4ade80; /* Green hacker-like text */
    
    --radius-lg: 16px;
    --radius-md: 8px;
    --radius-sm: 6px;
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    position: relative;
    overflow-x: hidden;
}

/* Background Abstract Shapes for Glassmorphism contrast */
.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    opacity: 0.5;
}

.shape-1 {
    top: -10%;
    left: -10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, rgba(18,18,18,0) 70%);
}

.shape-2 {
    bottom: -10%;
    right: -5%;
    width: 35vw;
    height: 35vw;
    background: radial-gradient(circle, rgba(74,222,128,0.15) 0%, rgba(18,18,18,0) 70%);
}

/* Main Container - Glassmorphism */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 800px;
    padding: 2.5rem;
    animation: slideUpFade 0.8s var(--transition-smooth) forwards;
}

/* Animations */
@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: 2rem;
}

.app-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Layout & Sections */
section {
    margin-bottom: 2rem;
}

.config-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 600px) {
    .config-section {
        grid-template-columns: 1fr;
    }
}

/* Form Controls */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mt-4 {
    margin-top: 1rem;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.label-with-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

input, textarea, select {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
    outline: none;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

textarea[readonly] {
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: default;
}

.hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Select Wrapper */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-secondary);
    pointer-events: none;
}

select {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}

/* Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    flex: 1;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    flex: 1;
}

.btn-secondary:hover:not(:disabled) {
    background: #333;
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-primary);
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.btn-icon:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

/* Pedagogical Terminal */
.pedagogical-section {
    background: var(--terminal-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    margin-bottom: 0;
}

.terminal-header {
    background: var(--bg-secondary);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
}

.terminal-dots {
    display: flex;
    gap: 6px;
    margin-right: 1rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

.terminal-title {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.terminal-window {
    padding: 1rem;
    min-height: 120px;
    max-height: 250px;
    overflow-y: auto;
}

#terminal-output {
    font-family: 'JetBrains Mono', 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    color: var(--terminal-text);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-all;
}

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

/* Progress Bar */
.progress-container {
    height: 4px;
    background: var(--bg-tertiary);
    width: 100%;
}

.progress-bar-fill {
    height: 100%;
    background: var(--accent-color);
    width: 0%;
    transition: width 0.1s linear;
}

/* Custom Scrollbar for Terminal */
.terminal-window::-webkit-scrollbar {
    width: 8px;
}

.terminal-window::-webkit-scrollbar-track {
    background: var(--terminal-bg);
}

.terminal-window::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.terminal-window::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.back-to-portfolio {
    margin-top: 1.5rem;
    text-align: center;
}

.link-back {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.link-back:hover {
    color: var(--text-primary);
}