:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.8);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #8b5cf6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --danger: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
}

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

.dashboard-container {
    max-width: 900px;
    padding: 2rem;
    width: 100%;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.5s ease-out forwards;
}

.logo-area {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-area h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.logo-area p {
    color: var(--text-muted);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-control {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.875rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(59, 130, 246, 0.6);
}

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    box-shadow: none;
}

.btn-danger {
    background: var(--danger);
}

.btn-success {
    background: var(--success);
}

/* Modal / Key Display */
.key-display {
    text-align: center;
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 12px;
    display: none;
}

.key-display h3 {
    color: var(--success);
    margin-bottom: 1rem;
}

.key-code {
    font-family: monospace;
    font-size: 1.5rem;
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 8px;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    user-select: all;
}

/* Dashboard specific */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.tab {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.tab.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out forwards;
}

.tab-content.active {
    display: block;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
}

.file-input-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    color: var(--text-muted);
    transition: all 0.3s;
}

.file-input-wrapper:hover .file-input-button {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-main);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    background: var(--card-bg);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.error {
    border-left-color: var(--danger);
}

.toast.success {
    border-left-color: var(--success);
}