/* CSS Variables for Theme */
:root {
    --primary-color: #5b6f9d;
    --secondary-color: #4a5a7a;
    --success-color: #28a745;
    --bg-gradient-start: #f8f9fa;
    --bg-gradient-end: #e9ecef;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --text-color: #212529;
    --text-muted: #6c757d;
    --input-bg: #ffffff;
    --input-border: #dee2e6;
    --input-text: #212529;
    --input-placeholder: #6c757d;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --btn-outline-color: #6c757d;
    --btn-outline-hover-bg: #f8f9fa;
}

[data-theme="dark"] {
    --primary-color: #6b7fa8;
    --secondary-color: #5a6a8a;
    --success-color: #3cb371;
    --bg-gradient-start: #2b3442;
    --bg-gradient-end: #1a1f2e;
    --card-bg: #3a4454;
    --card-border: rgba(255, 255, 255, 0.15);
    --text-color: #e9ecef;
    --text-muted: #adb5bd;
    --input-bg: #2b3442;
    --input-border: rgba(255, 255, 255, 0.2);
    --input-text: #e9ecef;
    --input-placeholder: #adb5bd;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --btn-outline-color: #adb5bd;
    --btn-outline-hover-bg: rgba(255, 255, 255, 0.1);
}

/* Global Styles */
body {
    background: var(--bg-gradient-start);
    color: var(--text-color);
}

#login-section {
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    transition: background 0.4s ease;
}

.login-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: all 0.3s ease;
    color: var(--text-color);
    box-shadow: 0 10px 40px var(--shadow-color);
}

/* Image Container */
.image-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Form Controls - DEFAULT STATE (no validation colors) */
.form-control {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--input-border);
    transition: all 0.3s ease;
}

.form-control::placeholder {
    color: var(--input-placeholder);
    opacity: 0.7;
}

.form-control:focus {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(91, 111, 157, 0.25);
}

/* IMPORTANT: Only show validation colors when form has 'was-validated' class */
.was-validated .form-control:invalid {
    border-color: #dc3545;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.75rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.was-validated .form-control:invalid:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
}

.was-validated .form-control:valid {
    border-color: #198754;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.75rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-label {
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.text-muted {
    color: var(--text-muted) !important;
}

/* Input Group */
.input-group .form-control {
    border-right: none;
}

.input-group .btn-password-toggle {
    background-color: var(--input-bg);
    color: var(--text-color);
    border-color: var(--input-border);
    border-left: none;
    transition: all 0.3s ease;
}

.input-group .btn-password-toggle:hover {
    background-color: var(--input-bg);
    color: var(--primary-color);
    border-color: var(--input-border);
}

.input-group .btn-password-toggle:focus {
    box-shadow: none;
    border-color: var(--input-border);
}

.input-group .form-control:focus + .btn-password-toggle {
    border-color: var(--primary-color);
}

/* When form is validated, apply validation colors to password button border too */
.was-validated .input-group .form-control:invalid + .btn-password-toggle {
    border-color: #dc3545;
}

.was-validated .input-group .form-control:valid + .btn-password-toggle {
    border-color: #198754;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: all 0.3s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(91, 111, 157, 0.4);
}

.btn-outline-secondary {
    color: var(--btn-outline-color);
    border-color: var(--input-border);
    background-color: transparent;
    transition: all 0.3s ease;
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    background-color: var(--btn-outline-hover-bg);
    border-color: var(--input-border);
    color: var(--text-color);
}

/* Theme Toggle Button */
.btn-theme-toggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-color);
    border: 2px solid var(--card-border);
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    z-index: 1000;
}

.btn-theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 4px 15px var(--shadow-color);
    background: var(--card-bg);
    color: var(--primary-color);
}

.btn-theme-toggle:focus {
    box-shadow: 0 0 0 0.25rem rgba(91, 111, 157, 0.25);
}

.btn-theme-toggle i {
    font-size: 1.2rem;
}

/* Links */
.link-success {
    color: var(--success-color) !important;
    transition: opacity 0.2s ease;
}

.link-success:hover {
    opacity: 0.8;
}

/* Animation for image */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

/* Alert */
.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    border-color: rgba(220, 53, 69, 0.3);
    color: #dc3545;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(220, 53, 69, 0.2);
    border-color: rgba(220, 53, 69, 0.4);
    color: #ff6b7a;
}

/* Invalid Feedback - ONLY show when form is validated */
.invalid-feedback {
    display: none;
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.was-validated .form-control:invalid ~ .invalid-feedback {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .login-card {
        margin: 20px;
    }

    .btn-theme-toggle {
        width: 45px;
        height: 45px;
        margin: 15px !important;
    }

    .btn-theme-toggle i {
        font-size: 1rem;
    }
}

/* Ensure smooth transitions */
* {
    transition-property: background-color, color, border-color;
    transition-duration: 0.3s;
    transition-timing-function: ease;
}