:root {
    --primary: var(--text-primary);
    --primary-hover: var(--text-primary);
    --secondary: var(--text-secondary);
    --secondary-hover: var(--text-primary);
    --glass-blur: none;
    --transition-speed: 0.15s;
}

.glass-background {
    display: none !important;
}

body {
    font-family: var(--font-mono) !important;
    background-color: var(--bg-color) !important;
    color: var(--text-primary) !important;
    min-height: 100vh;
    padding: 2rem 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading) !important;
    background: none !important;
    -webkit-text-fill-color: initial !important;
    color: var(--text-primary) !important;
}

.main-icon, .upload-icon, .icon {
    color: var(--text-primary) !important;
    filter: none !important;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary) !important;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    background: var(--card-bg) !important;
    padding: 0.4rem 0.85rem !important;
    border-radius: 0 !important;
    border: 2px solid var(--border-color) !important;
    box-shadow: none !important;
}

.back-link:hover {
    background: var(--card-bg-hover) !important;
    transform: none !important;
}

.glass-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 10%, #1e1b4b 0%, #0c0e12 50%),
                radial-gradient(circle at 90% 90%, #312e81 0%, #0c0e12 50%);
    z-index: -1;
}

.app-container {
    max-width: 1200px;
    width: 95%;
    padding: 2.5rem 0;
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.main-icon {
    width: 50px;
    height: 50px;
    color: var(--primary);
}

.pulse-soft {
    animation: pulse 4s ease-in-out infinite;
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 650px;
    line-height: 1.6;
    margin: 0 auto;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    padding: 2.5rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

/* Main Grid */
.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.input-pane, .output-pane {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pane-header label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
}

textarea {
    width: 100%;
    min-height: 300px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 1.5rem;
    color: white;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    outline: none;
    resize: none;
}

.output-display {
    width: 100%;
    min-height: 300px;
    background: rgba(0,0,0,0.4);
    border: 1px solid var(--primary);
    border-radius: 1.5rem;
    padding: 1.5rem;
    color: white;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre;
}

/* Control Pane */
.control-pane {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255,255,255,0.03);
    padding: 1.5rem 2rem;
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
}

.control-box {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 400px;
}

.control-box label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.semitone-selector {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 0.5rem;
}

.semitone-selector #semitone-val {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    min-width: 60px;
    text-align: center;
}

.btn-step {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-step:hover {
    background: var(--primary);
    border-color: var(--primary);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--primary);
}

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

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 1.25rem 2.5rem;
    border-radius: 1.5rem;
    border: none;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 30px -5px rgba(99, 102, 241, 0.5);
}

.btn-primary:active {
    transform: scale(0.96);
}

/* Nav Back */
.nav-back {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 2rem;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.6rem 1.25rem;
    border-radius: 3rem;
    border: 1px solid var(--border-color);
}

.back-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

/* Privacy & Footer */
footer {
    margin-top: 4rem;
    text-align: center;
}

.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    padding: 0.75rem 1.5rem;
    border-radius: 3rem;
    font-size: 0.9rem;
    border: 1px solid rgba(16, 185, 129, 0.2);
    font-weight: 500;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.4)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.6)); transform: scale(1.05); }
}