:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --success-color: #10b981;
    --glass-blur: blur(12px);
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    margin-bottom: 40px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -1px;
}

.logo span {
    color: var(--primary-color);
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 30px;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover, nav a.active {
    color: var(--text-main);
}

nav a.active {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 5px;
}

/* Card & Glassmorphism */
.glass {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.card {
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* Forms */
.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

input[type="text"],
input[type="password"],
textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

small {
    display: block;
    margin-top: 8px;
    color: var(--text-muted);
    font-size: 12px;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Alerts */
.alert {
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 25px;
    font-weight: 500;
}

.alert.success {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Footer */
footer {
    text-align: center;
    padding: 60px 0;
    color: var(--text-muted);
    font-size: 14px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard Specific */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    align-items: start;
    margin-bottom: 40px;
}

.input-panel {
    position: sticky;
    top: 20px;
}

.w-full {
    width: 100%;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge.active {
    background: var(--primary-color);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

/* Pipeline Visualization */
.pipeline-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    opacity: 0.4;
    transition: opacity 0.3s;
}

.step.active {
    opacity: 1;
}

.step-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-bottom: 10px;
    border: 2px solid transparent;
}

.step.active .step-icon {
    background: var(--primary-color);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.step.complete .step-icon {
    background: var(--success-color);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
}

.step-label {
    font-size: 13px;
    font-weight: 600;
}

.step-divider {
    width: 40px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    margin: 0 10px;
    margin-top: -20px;
}

/* Preview Area */
.preview-area {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    min-height: 600px;
    padding: 30px;
    overflow-y: auto;
    max-height: 800px;
}

.preview-area.empty {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.empty-state {
    text-align: center;
}

.empty-state svg {
    margin-bottom: 15px;
    opacity: 0.3;
}

/* Action Buttons */
.actions {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .input-panel {
        position: static;
    }
}