/* Base Dark Theme Variables */
:root {
    --bg-color: #111115;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a5;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --error-color: #ef4444;
    --success-color: #10b981;
}

body,
html {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container & Layout */
.converter-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Translucent Glass Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    text-align: center;
}

h1 {
    margin-top: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

/* Form Controls */
.input-group {
    margin-bottom: 25px;
}

.file-input {
    width: 100%;
    padding: 12px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px dashed var(--card-border);
    border-radius: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    box-sizing: border-box;
}

.file-input::file-selector-button {
    background: var(--card-border);
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    margin-right: 15px;
    transition: background 0.2s ease;
}

.file-input::file-selector-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.primary-btn {
    width: 100%;
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

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

.primary-btn:active {
    transform: scale(0.98);
}

/* Status Messages */
.status-message {
    margin-top: 20px;
    font-size: 0.9rem;
    min-height: 20px;
}

.status-error {
    color: var(--error-color);
}

.status-success {
    color: var(--success-color);
}

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

/* Responsive adjustments for slim phone screens */
@media (max-width: 480px) {
    .glass-card {
        padding: 25px 20px;
        border-radius: 20px;
    }

    h1 {
        font-size: 1.5rem;
    }
}

/* Privacy Note */
.privacy-note {
    margin-top: 35px;
    padding-top: 20px;
    border-top: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

.privacy-note svg {
    color: var(--success-color);
    flex-shrink: 0;
}

.privacy-note span {
    opacity: 0.8;
}