/* Sign In Page Styles */
.signin-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
    padding: 2rem 0;
}

.signin-container .row {
    margin: 0 auto;
    max-width: 1200px;
}

.signin-container .col-md-6,
.signin-container .col-lg-5 {
    padding: 0 15px;
}

.signin-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
            circle at 20% 50%,
            rgba(255, 255, 255, 0.1) 0%,
            transparent 50%
        ),
        radial-gradient(
            circle at 80% 80%,
            rgba(255, 255, 255, 0.1) 0%,
            transparent 50%
        );
    animation: pulse 8s ease-in-out infinite;
}

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

.signin-card {
    border: none;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
    animation: slideUp 0.8s ease-out;
    position: relative;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.signin-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 2rem;
    text-align: center;
}

.signin-header h2 {
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.signin-header p {
    opacity: 0.95;
    margin: 0;
}

.signin-body {
    padding: 3rem 2.5rem;
    background: white;
}

.btn-oauth {
    border: 2px solid;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 1rem;
}

.btn-oauth:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-google {
    background: white;
    border-color: #db4437;
    color: #db4437;
}

.btn-google:hover {
    background: #db4437;
    color: white;
}

.btn-github {
    background: white;
    border-color: #333;
    color: #333;
}

.btn-github:hover {
    background: #333;
    color: white;
}

.btn-microsoft {
    background: white;
    border-color: #00a4ef;
    color: #00a4ef;
}

.btn-microsoft:hover {
    background: #00a4ef;
    color: white;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 2rem 0;
}

.divider::before,
.divider::after {
    content: "";
    flex: 1;
    border-bottom: 2px solid #e9ecef;
}

.divider span {
    padding: 0 1rem;
    color: #718096;
    font-weight: 600;
}

.signin-footer {
    margin-top: 2rem;
    text-align: center;
    color: #718096;
}

.signin-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.signin-footer a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    animation: slideDown 0.5s ease-out;
}

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

.feature-icons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
}

.feature-icon {
    text-align: center;
    color: white;
}

.feature-icon i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.feature-icon span {
    font-size: 0.85rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .signin-container {
        padding: 0;
        min-height: 100vh;
        height: 100vh;
    }

    .signin-container .row {
        margin: 0;
        height: 100vh;
    }

    .signin-container .col-md-6,
    .signin-container .col-lg-5 {
        padding: 0;
        max-width: 100%;
        flex: 0 0 100%;
    }

    .signin-card {
        margin: 0;
        border-radius: 0;
        max-width: 100%;
        height: 100vh;
        display: flex;
        flex-direction: column;
        box-shadow: none;
    }

    .signin-header {
        padding: 2rem 1.5rem;
    }

    .signin-header h2 {
        font-size: 1.5rem;
    }

    .signin-body {
        padding: 2rem 1.5rem;
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .btn-oauth {
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
    }

    .feature-icons {
        gap: 1rem;
        padding: 1.5rem;
    }

    .feature-icon i {
        font-size: 1.5rem;
    }
}