:root {
    --primary-color: #ecf0f1;
    --accent-color: #800000;
    /* Corporate Red/Maroon */
    --success-color: #27ae60;
    --error-color: #e74c3c;
    /* Corporate Red & Dark Palette */
    --bg-color: #0f1218;
    --bg-gradient: radial-gradient(circle at center, #1a1c20 0%, #0f1218 100%);
    --glass-bg: rgba(20, 22, 26, 0.85);
    --glass-border: rgba(255, 255, 255, 0.05);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    --text-main: #ffffff;
    --text-muted: #888888;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-color);
    background-image:
        radial-gradient(circle at 20% 30%, rgba(52, 152, 219, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(52, 152, 219, 0.05) 0%, transparent 40%),
        var(--bg-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    overflow: hidden;
}

/* Subtle pattern overlay */
body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    z-index: -1;
}

.login-container {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 50px 40px;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    text-align: center;
    animation: fadeIn 1s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.logo-box {
    margin-bottom: 30px;
}

.corporate-logo {
    max-width: 160px;
    height: auto;
    filter: drop-shadow(0 10px 15px rgba(0, 0, 0, 0.3));
    transition: transform 0.4s ease;
}

.corporate-logo:hover {
    transform: scale(1.05);
}

.login-container h2 {
    margin-bottom: 35px;
    color: var(--text-main);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.input-group {
    text-align: left;
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-group input {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.input-group input:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 4px rgba(128, 0, 0, 0.2);
}

.input-group input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--accent-color), #4a0000);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-top: 15px;
    box-shadow: 0 10px 20px rgba(128, 0, 0, 0.3);
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(128, 0, 0, 0.4);
    filter: brightness(1.1);
}

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

.error-message {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--error-color);
    padding: 14px;
    border-radius: 10px;
    margin-bottom: 25px;
    font-size: 0.9rem;
    border: 1px solid rgba(231, 76, 60, 0.2);
    border-left: 5px solid var(--error-color);
}