:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #8b5cf6;
    /* Violet */
    --accent-secondary: #06b6d4;
    /* Cyan */
    --accent-hover: #7c3aed;
    --border-color: #334155;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --font-main: 'Outfit', sans-serif;
    --transition-speed: 0.2s;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

.app-container {
    width: 100%;
    max-width: 800px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.app-header h1 {
    text-align: center;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-secondary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

/* Navigation */
.tab-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    background: var(--card-bg);
    padding: 5px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
    transition: all var(--transition-speed);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 2px 4px rgba(139, 92, 246, 0.3);
}

/* Content Area */
.content-area {
    flex: 1;
    position: relative;
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.content-section.active {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

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

/* Controls */
.controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button {
    font-family: var(--font-main);
    font-size: 1rem;
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
    font-weight: 600;
}

button:active {
    transform: scale(0.98);
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    flex: 2;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.primary-btn:hover {
    box-shadow: 0 6px 16px rgba(139, 92, 246, 0.4);
}

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

.secondary-btn:hover {
    border-color: var(--accent-secondary);
    color: var(--text-primary);
}

/* Result Cards */
.result-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border-color);
    min-height: 300px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.placeholder-text {
    color: var(--text-secondary);
    text-align: center;
    margin: auto;
    font-style: italic;
}

/* Field Items */
.field-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.field-group:hover {
    border-color: var(--border-color);
}

.field-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex: 1;
}

.field-value {
    color: var(--text-primary);
    font-weight: 600;
    flex: 2;
    text-align: right;
    margin-right: 12px;
}

.lock-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 4px;
    cursor: pointer;
    opacity: 0.5;
    transition: all 0.2s;
    font-size: 1.2rem;
}

.lock-btn:hover {
    opacity: 1;
    color: var(--accent-secondary);
}