* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('../img/MN-Electro-signin.jpg') center/cover no-repeat fixed;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: linear-gradient(180deg, rgba(14, 165, 233, 0.25), rgba(59, 130, 246, 0.35));
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(14, 165, 233, 0.15), transparent 25%),
                radial-gradient(circle at 80% 30%, rgba(59, 130, 246, 0.12), transparent 20%),
                radial-gradient(circle at 50% 80%, rgba(14, 165, 233, 0.10), transparent 30%);
    pointer-events: none;
    z-index: 0;
}

.signin-card {
    width: min(100%, 420px);
    padding: 40px 35px;
    border-radius: 16px;
    background: #fefdfb;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
    border-top: 4px solid #1a1a1a;
}

.signin-card h1, .signin-card h2 {
    text-align: center;
    color: #1a1a1a;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 25px;
}

.signin-card .subtitle {
    text-align: center;
    color: #666;
    font-size: 0.875rem;
    margin-bottom: 25px;
    line-height: 1.5;
}

.signin-logo {
    display: block;
    max-width: 150px;
    margin: 0 auto 30px;
}

.signin-card form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 14px;
    color: #1a1a1a;
    font-size: 1rem;
    z-index: 2;
}

.signin-card input {
    width: 100%;
    padding: 14px 14px 14px 42px;
    border: 1px solid #ddd;
    border-radius: 10px;
    background: #fff;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.signin-card input:focus {
    outline: none;
    border-color: #1a1a1a;
    box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.15);
}

.signin-card input::placeholder {
    color: #999;
}

.forgot-link {
    text-align: right;
    margin-top: -10px;
}

.forgot-link a {
    color: #1a1a1a;
    font-size: 0.875rem;
    text-decoration: none;
    font-weight: 500;
}

.forgot-link a:hover {
    text-decoration: underline;
}

.btn-primary {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #0ea5e9 0%, #2563eb 100%) !important;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 10px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0284c7 0%, #1d4ed8 100%) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
    padding: 8px 20px;
    border: 1px solid #0ea5e9;
    border-radius: 8px;
    background: transparent;
    color: #0ea5e9;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: #0ea5e9;
    color: #fff;
}

.signin-footer {
    margin-top: 25px;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
}

.signin-footer a {
    color: #0ea5e9;
    border: 1px solid #0ea5e9;
    padding: 6px 16px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
}

.signin-footer a:hover {
    text-decoration: underline;
}

.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: #1a1a1a;
    font-size: 0.9rem;
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.back-link a:hover {
    text-decoration: underline;
}

.error-message {
    background: #fee2e2;
    border: 1px solid #ef4444;
    color: #b91c1c;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    text-align: center;
    margin-bottom: 15px;
}

.success-message {
    background: #d1fae5;
    border: 1px solid #10b981;
    color: #047857;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    text-align: center;
    margin-bottom: 15px;
}

@media (max-width: 480px) {
    body {
        padding: 20px;
    }

    .signin-card {
        width: 100%;
        padding: 30px 25px;
    }

    .signin-card h1, .signin-card h2 {
        font-size: 1.5rem;
    }
}