.login-dark {
    position: relative;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow: hidden;
}

.background-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    filter: brightness(0.6) blur(5px);
    z-index: 0;
}

.overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1;
}

.login-card {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 380px;
    background: rgba(20, 20, 20, 0.7);
    backdrop-filter: blur(18px);
    border-radius: 20px;
    padding: 48px 40px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.5);
    text-align: center;
    color: #fff;
}

.login-card .headline {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}
.login-card .subtitle {
    font-size: 15px;
    color: #aaa;
    margin-bottom: 32px;
    font-weight: 300;
}

.login-card .error {
    background: rgba(255, 0, 70, 0.15);
    border: 1px solid rgba(255, 0, 70, 0.4);
    color: #ff4d6d;
    padding: 10px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 20px;
    text-align: left;
}

.login-card input[type="email"],
.login-card input[type="password"] {
    width: 100%;
    padding: 14px;
    margin-bottom: 18px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 12px;
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-size: 15px;
    transition: border 0.3s ease, background 0.3s ease;
}
.login-card input:focus {
    border-color: #fff;
    background: rgba(255,255,255,0.08);
    outline: none;
}
.login-card input::placeholder {
    color: #aaa;
}

.login-card .options {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 28px;
    font-size: 14px;
    color: #ccc;
}
.login-card .options input {
    accent-color: #fff;
    margin-right: 8px;
}

.login-card .btn-primary {
    width: 100%;
    padding: 14px;
    background: #fff;
    color: #000;
    font-weight: 600;
    font-size: 16px;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.login-card .btn-primary:hover {
    background: #e6e6e6;
    transform: translateY(-2px);
}
.login-card .btn-primary:active {
    background: #ccc;
    transform: translateY(0);
}

.login-card .forgot {
    display: block;
    margin-top: 24px;
    font-size: 14px;
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
}
.login-card .forgot:hover {
    color: #fff;
}

@media (max-width: 500px) {
    .login-card {
        padding: 32px 24px;
        border-radius: 16px;
    }
    .login-card .headline {
        font-size: 24px;
    }
}