:root {
    --bg-dark: #0f1115;
    --bg-card: rgba(26, 29, 36, 0.6);
    --border-color: rgba(255, 255, 255, 0.08);
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --success: #10b981;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-x: hidden;
}

.background-mesh {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    filter: blur(100px);
    border-radius: 50%;
    opacity: 0.5;
    animation: drift 15s infinite alternate ease-in-out;
}

.blob-1 {
    top: -10%; left: -10%;
    width: 50vw; height: 50vw;
    background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
}

.blob-2 {
    bottom: -10%; right: -10%;
    width: 60vw; height: 60vw;
    background: radial-gradient(circle, #8b5cf6 0%, transparent 70%);
}

@keyframes drift {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(20px) scale(1.05); }
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    z-index: 10;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.logo svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

header h1 {
    font-weight: 700;
    font-size: 2rem;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, opacity 0.3s ease;
    margin-bottom: 1.5rem;
}

.hidden {
    display: none !important;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.drop-zone .icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    color: var(--primary);
}

.drop-zone h3 {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.drop-zone p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-muted);
    background: rgba(255,255,255,0.05);
}

.input-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.input-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

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

.flex-title svg {
    color: var(--primary);
}

.progress-container {
    margin-top: 1rem;
    text-align: center;
}

.progress-bar {
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s ease;
}

.result-section {
    text-align: center;
}

.success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
    padding: 1rem;
}

.result-section h3 {
    margin-bottom: 0.5rem;
}

.result-section p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.loader-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 17, 21, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 20px;
    z-index: 50;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}