:root {
    --primary: #00a651;
    --primary-dark: #006837;
    --primary-light: #22c55e;
    --secondary: #3399ff;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --background: #000000;
    --background-secondary: #111111;
    --background-tertiary: #1a1a1a;
    --card-background: rgba(26, 26, 26, 0.95);
    --text: #ffffff;
    --text-muted: #cccccc;
    --text-secondary: #999999;
    --border: #333333;
    --border-light: #404040;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.5);
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --transition: 0.3s ease;
}

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

body {
    background: linear-gradient(135deg, var(--background) 0%, var(--background-secondary) 50%, var(--background) 100%);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 20%, rgba(0, 166, 81, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(51, 153, 255, 0.15) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-30px) translateX(20px);
        opacity: 0.6;
    }
}

.container {
    max-width: 600px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.back-link {
    margin-bottom: 2rem;
}

.back-link a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    background: var(--card-background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.back-link a:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateX(5px);
}

.download-wrapper {
    position: relative;
}

.login-box,
.download-box {
    background: var(--card-background);
    backdrop-filter: blur(20px);
    border: 2px solid var(--border);
    border-radius: var(--border-radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.6s ease;
}

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

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

.logo-container i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.logo-container h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
}

.welcome-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-group i {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.2rem;
}

.input-group input {
    width: 100%;
    padding: 1.25rem 3.5rem 1.25rem 1.25rem;
    background: var(--background-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--border-radius-lg);
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    direction: ltr;
    text-align: center;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 166, 81, 0.1);
}

.input-group input::placeholder {
    color: var(--text-secondary);
    font-weight: 400;
}

.btn-primary,
.btn-secondary,
.btn-download {
    width: 100%;
    padding: 1.25rem;
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 166, 81, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-download {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: var(--shadow-lg);
    font-size: 1.3rem;
    padding: 1.5rem;
    margin: 2rem 0;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 166, 81, 0.5);
}

.loading-spinner {
    display: none;
}

.divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--border);
}

.divider::before {
    right: 0;
}

.divider::after {
    left: 0;
}

.divider span {
    background: var(--card-background);
    padding: 0 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

.info-box {
    background: rgba(51, 153, 255, 0.1);
    border: 1px solid rgba(51, 153, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.info-box i {
    color: var(--secondary);
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.info-box p {
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

.info-box strong {
    color: var(--text);
}

#saved-keys {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border);
}

#saved-keys h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.saved-key-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--background-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
}

.masked-key {
    font-family: 'Courier New', monospace;
    color: var(--text);
    font-weight: 600;
    letter-spacing: 1px;
}

.key-actions {
    display: flex;
    gap: 0.5rem;
}

.key-action-button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.key-action-button:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.download-box {
    text-align: center;
}

.success-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--success), #16a34a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.success-icon i {
    font-size: 3rem;
    color: white;
}

.download-box h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 1rem;
}

.success-message {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.download-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.info-item {
    background: var(--background-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary);
}

.info-item div {
    text-align: right;
    flex: 1;
}

.info-item strong {
    display: block;
    color: var(--text);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.info-item span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.action-btn {
    padding: 1rem;
    background: var(--background-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--border-radius-lg);
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.action-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.logout-btn {
    margin-top: 2rem;
    padding: 1rem 2rem;
    background: transparent;
    border: 2px solid var(--danger);
    color: var(--danger);
    border-radius: var(--border-radius-lg);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
}

.logout-btn:hover {
    background: var(--danger);
    color: white;
    transform: translateY(-2px);
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    background: var(--card-background);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    transform: translateX(-400px);
    transition: var(--transition);
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

.toast i {
    font-size: 1.3rem;
}

.toast.success {
    border-right: 4px solid var(--success);
}

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

.toast.error {
    border-right: 4px solid var(--danger);
}

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

#toast-message {
    color: var(--text);
    font-weight: 600;
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .login-box,
    .download-box {
        padding: 2rem 1.5rem;
    }

    .logo-container i {
        font-size: 3rem;
    }

    .logo-container h1 {
        font-size: 1.5rem;
    }

    .download-info {
        grid-template-columns: 1fr;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .toast {
        left: 1rem;
        right: 1rem;
        min-width: auto;
    }
}