:root {
    --background-color: linear-gradient(to bottom, #BFE6D2, #78CFA9);
    --background-image: url('/static/images/Pic3.png');

    --text-color: #1F4736;

    --card-background: rgba(255, 255, 255, 0.92);
    --container-background: rgba(255, 255, 255, 0.92);

    --nav-background: #4F9F7C;
    --nav-text-color: white;

    --button-background: linear-gradient(to right, #78CFA9, #5FBF98);
    --button-hover-background: linear-gradient(to right, #5FBF98, #3F8F6C);

    --primary-color: #5FBF98;
    --secondary-color: #78CFA9;
    --accent-color: #BFE6D2;

    --button-gradient-start: #78CFA9;
    --button-gradient-end: #5FBF98;

    --button-hover-gradient-start: #5FBF98;
    --button-hover-gradient-end: #3F8F6C;

    --modal-background: rgba(0, 0, 0, 0.5);

    --input-border: #ccc;
    --input-background: white;
    --link-color: #5FBF98;
    --error-color: #f44336;
    --success-color: #4CAF50;
}

/* Тёмная тема */
html.dark-theme {
    --background-color: linear-gradient(to bottom, #2F5A47, #1F3F33);
    --background-image: url('/static/images/Pic3.png');

    --text-color: #EAF7F0;

    --card-background: rgba(31, 63, 51, 0.95);
    --container-background: rgba(31, 63, 51, 0.95);

    --nav-background: #1F3F33;
    --nav-text-color: #EAF7F0;

    --button-background: linear-gradient(to right, #4E8C6F, #3A6F57);
    --button-hover-background: linear-gradient(to right, #3A6F57, #2B4F3F);

    --primary-color: #6FBF97;
    --secondary-color: #4E8C6F;
    --accent-color: #2F5A47;

    --button-gradient-start: #4E8C6F;
    --button-gradient-end: #3A6F57;

    --button-hover-gradient-start: #3A6F57;
    --button-hover-gradient-end: #2B4F3F;

    --modal-background: rgba(0, 0, 0, 0.85);

    --input-border: #4E8C6F;
    --input-background: rgba(31, 63, 51, 0.8);
    --link-color: #6FBF97;
}

.login-main-layout {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 70px);
    padding: 20px;
    margin-top: 70px;
    box-sizing: border-box;
}

.form-container {
    background: var(--container-background);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
    max-width: 450px;
    width: 100%;
    animation: fadeIn 0.8s ease-in-out;
    backdrop-filter: blur(2px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 30px;
    font-size: 32px;
    font-family: 'Great Vibes', cursive;
    font-weight: normal;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: var(--input-background);
    color: var(--text-color);
    box-sizing: border-box;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(95, 191, 152, 0.5);
}

.form-container .btn {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: linear-gradient(to right, var(--button-gradient-start), var(--button-gradient-end));
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.form-container .btn:hover {
    background: linear-gradient(to right, var(--button-hover-gradient-start), var(--button-hover-gradient-end));
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
}

.form-container .btn:active {
    transform: translateY(0);
}

p {
    text-align: center;
    margin-top: 20px;
    color: var(--text-color);
}

p a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: bold;
    transition: opacity 0.3s ease;
}

p a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Стили для flash сообщений */
.alert-container {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: 90%;
    max-width: 500px;
}

.alert {
    padding: 12px 20px;
    border-radius: 10px;
    margin-bottom: 10px;
    text-align: center;
    font-weight: bold;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background-color: var(--success-color);
    color: white;
}

.alert-error, .alert-danger {
    background-color: var(--error-color);
    color: white;
}

.alert-info {
    background-color: var(--primary-color);
    color: white;
}

@media (max-width: 768px) {
    .login-main-layout {
        min-height: calc(100vh - 60px);
        margin-top: 60px;
        padding: 15px;
    }

    .form-container {
        padding: 25px;
    }

    h1 {
        font-size: 28px;
    }

    .form-control {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .login-main-layout {
        min-height: calc(100vh - 55px);
        margin-top: 55px;
        padding: 12px;
    }

    .form-container {
        padding: 20px;
    }

    h1 {
        font-size: 24px;
    }
}

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--input-background) inset !important;
    -webkit-text-fill-color: var(--text-color) !important;
}