:root {
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --primary-color: #38bdf8;
    --accent-color: #fbbf24;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.15) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(251, 191, 36, 0.1) 0%, transparent 20%);
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    border-radius: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Form Elements */
.form-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-select, .form-control {
    background-color: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-select:focus, .form-control:focus {
    background-color: rgba(15, 23, 42, 0.9);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
    color: white;
}

/* Custom Dropdown Arrow */
.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2338bdf8' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

/* Button */
.btn-primary-glow {
    background: linear-gradient(135deg, var(--primary-color), #0ea5e9);
    border: none;
    color: white;
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 14px 0 rgba(56, 189, 248, 0.39);
}

.btn-primary-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(56, 189, 248, 0.5);
    color: white;
}

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

/* Cards */
.angle-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid transparent;
    transition: all 0.3s ease;
    cursor: pointer;
}

.angle-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.angle-card.selected {
    background: rgba(56, 189, 248, 0.1);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

/* Result Area */
#resultArea {
    min-height: 200px;
    white-space: pre-wrap;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Copy Button */
.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s;
}

.copy-btn:hover {
    background: rgba(255,255,255,0.2);
}