/* Convertbox - Suite Style CSS */

:root {
    --bg-dark: #020617; /* Slate 950 */
    --surface: rgba(15, 23, 42, 0.7); /* Slate 900 with opacity */
    --surface-hover: rgba(30, 41, 59, 0.8); /* Slate 800 */
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --primary-color: #6366f1;
    --text-main: #f8fafc; /* Slate 50 */
    --text-muted: #94a3b8; /* Slate 400 */
    --border-color: rgba(255, 255, 255, 0.08);
    --accent-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --glass-bg: rgba(15, 23, 42, 0.7);
    --input-bg: rgba(255, 255, 255, 0.05);
}

[data-bs-theme="light"] {
    --bg-dark: #f8fafc;
    --surface: rgba(255, 255, 255, 0.7);
    --surface-hover: rgba(255, 255, 255, 0.9);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --input-bg: rgba(0, 0, 0, 0.03);
    --accent-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

body {
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 20% 20%, #1e1b4b 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, #312e81 0%, transparent 40%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease;
}

[data-bs-theme="light"] body {
    background-image: 
        radial-gradient(circle at 20% 20%, #e0e7ff 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, #f5f3ff 0%, transparent 40%);
}

.container {
    background: var(--surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 32px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 550px;
    padding: 3rem;
    margin: 1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

[data-bs-theme="light"] .container {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

h1 {
    font-weight: 800;
    letter-spacing: -1.5px;
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

p.subtitle {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 1rem;
    font-weight: 500;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input[type="text"], select {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    transition: all 0.2s ease;
    box-sizing: border-box;
    appearance: none;
}

select option {
    background: #0f172a; /* Solid dark background for options */
    color: #f8fafc;
}

[data-bs-theme="light"] select option {
    background: #ffffff;
    color: #0f172a;
}

input[type="text"]:focus, select:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

[data-bs-theme="light"] input[type="text"]:focus, [data-bs-theme="light"] select:focus {
    background: rgba(255, 255, 255, 1);
}

.format-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.format-option {
    flex: 1;
    position: relative;
}

.format-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.format-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    cursor: pointer;
    font-weight: 700;
    transition: all 0.2s ease;
    text-transform: none;
    letter-spacing: normal;
    color: var(--text-main);
}

.format-option input:checked + .format-label {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: var(--accent-glow);
}

.btn-convert {
    width: 100%;
    padding: 1.25rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 16px;
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 2rem;
}

.btn-convert:hover:not(:disabled) {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.4);
}

.btn-convert:active:not(:disabled) {
    transform: translateY(-1px) scale(1);
}

.btn-convert:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

/* Progress Bar */
.progress-container {
    margin-top: 2rem;
    display: none;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.progress-bar-bg {
    width: 100%;
    height: 12px;
    background: var(--input-bg);
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--primary-gradient);
    transition: width 0.3s ease;
    box-shadow: var(--accent-glow);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--surface);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    backdrop-filter: blur(12px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--surface-hover);
}

/* Utilities */
.hidden { display: none !important; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }