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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
}

.sidebar {
    width: 320px;
    background: linear-gradient(180deg, #5b4cdb 0%, #3d2db7 50%, #2d1b69 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.logo-section {
    position: relative;
    z-index: 2;
    text-align: center;
    margin-bottom: 60px;
}

.logo {
    color: white;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.company-name {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
}

.nav-menu {
    position: relative;
    z-index: 2;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.nav-item {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 16px 20px;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    cursor: pointer;
    opacity: 0.5;
}

.nav-item.enabled {
    opacity: 1;
    pointer-events: auto;
}

.nav-item.enabled:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.nav-item i {
    font-size: 18px;
    width: 20px;
}

.nav-item span {
    font-weight: 500;
    font-size: 15px;
}

.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: #f8fafc;
    position: relative;
}

.login-container {
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    padding: 48px;
    width: 100%;
    max-width: 420px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #5b4cdb, #764ba2);
}

.welcome-text {
    margin-bottom: 32px;
}

.welcome-text h1 {
    color: #1e293b;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.welcome-text p {
    color: #64748b;
    font-size: 16px;
}

.form-group {
    margin-bottom: 24px;
    text-align: left;
}

.form-group label {
    display: block;
    color: #374151;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-input {
    width: 100%;
    padding: 16px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-input:focus {
    outline: none;
    border-color: #5b4cdb;
    background: white;
    box-shadow: 0 0 0 3px rgba(91, 76, 219, 0.1);
}

.form-input.error {
    border-color: #dc2626;
    background: #fef2f2;
}

.error-message {
    color: #dc2626;
    font-size: 14px;
    margin-top: 8px;
    padding: 8px 12px;
    background: #fef2f2;
    border-radius: 8px;
    border-left: 3px solid #dc2626;
    display: none;
    animation: slideDown 0.3s ease-out;
}

.error-message.show {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-button {
    width: 100%;
    background: linear-gradient(135deg, #5b4cdb 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 8px;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(91, 76, 219, 0.3);
}

.login-button:active {
    transform: translateY(0);
}

.status-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    z-index: 1000;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(-20px);
}

.status-indicator.show {
    opacity: 1;
    transform: translateY(0);
}

.status-indicator.logged-out {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.status-indicator.logged-in {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        padding: 20px;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .nav-menu {
        flex-direction: row;
        gap: 8px;
        width: auto;
    }

    .nav-item {
        padding: 12px;
        min-width: auto;
    }

    .nav-item span {
        display: none;
    }

    .main-content {
        padding: 20px;
    }

    .login-container {
        padding: 32px 24px;
    }
}