/* General Layout */
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #001540 0%, #003875 50%, #0056b3 100%);
    color: #f0f4f8;
    min-height: 100vh;
    background-attachment: fixed;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 119, 198, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Centered Container */
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    min-height: 100vh;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Header Text */
.header {
    text-align: center;
    margin-bottom: 2rem;
    width: 100%;
    animation: fadeInDown 0.8s ease-out;
}

.header .logo {
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
    display: block;
    border-radius: 50%;
    box-shadow: 0 8px 25px rgba(0, 21, 64, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.header .logo:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(0, 21, 64, 0.6);
}

.header h2 {
    color: #ffffff;
    margin: 0;
    font-size: 2.2rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
}

.header p {
    margin: 0.5rem 0;
    font-size: 1.1rem;
    color: #d1e8ff;
    font-weight: 500;
}

/* Form Styling */
form {
    background: rgba(255, 255, 255, 0.8);
    padding: 2.5rem;
    border-radius: 16px;
    width: 100%;
    max-width: 520px;
    box-shadow: 
        0 15px 35px rgba(0, 0, 0, 0.3),
        0 5px 15px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    position: relative;
    overflow: hidden;
    animation: slideInUp 0.8s ease-out 0.2s both;
}

/* Form Glass Effect */
form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

/* Labels */
label {
    display: block;
    margin-bottom: 1.2rem;
    font-weight: 600;
    color: #000000;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
}

/* Input Fields */
input[type="text"],
input[type="password"],
input[type="hidden"] {
    width: 100%;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    border: 2px solid rgba(0, 21, 64, 0.3);
    border-radius: 10px;
    box-sizing: border-box;
    margin-top: 0.5rem;
    background-color: rgba(255, 255, 255, 0.95);
    color: #001540;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    box-shadow: 
        0 0 0 3px rgba(0, 56, 117, 0.3),
        0 4px 15px rgba(0, 21, 64, 0.2);
    border-color: #003875;
    background-color: #ffffff;
    transform: translateY(-2px);
}

input[type="text"]:hover,
input[type="password"]:hover {
    border-color: rgba(0, 56, 117, 0.5);
    box-shadow: 0 2px 8px rgba(0, 21, 64, 0.1);
}

/* Submit Button */
button {
    background: linear-gradient(135deg, #001540 0%, #003875 100%);
    color: white;
    border: none;
    padding: 0.9rem 2rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 10px;
    cursor: pointer;
    width: 100%;
    margin-top: 1.5rem;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

button:hover::before {
    left: 100%;
}

button:hover {
    background: linear-gradient(135deg, #002a5c 0%, #004a94 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 21, 64, 0.3);
}

button:active {
    transform: translateY(-1px);
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Flash Messages */
.flash-message {
    padding: 0.8rem 1.2rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
}

.flash-success {
    background: rgba(46, 160, 67, 0.9);
    color: white;
    border: 1px solid #2ea043;
}

.flash-error {
    background: rgba(218, 54, 51, 0.9);
    color: white;
    border: 1px solid #da3633;
}

.flash-warning {
    background: rgba(255, 193, 7, 0.9);
    color: #001540;
    border: 1px solid #ffc107;
}

/* Additional Professional Elements */
.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #001540;
    opacity: 0.6;
}

/* Loading state for form */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    form {
        padding: 1.5rem;
        margin: 0 10px;
        width: 80%;
    }
    .header h2 {
        font-size: 1.5rem;
    }
    .header .logo {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0.5rem;
    }
    form {
        padding: 1.2rem;
        margin: 0 5px;
    }
    .header h2 {
        font-size: 1.3rem;
    }
    .header .logo {
        width: 60px;
        height: 60px;
    }
    input[type="text"] {
        padding: 0.5rem;
    }
    button {
        padding: 0.6rem;
        font-size: 1rem;
    }
}