: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;
    --form-background: white;
    --success-color: #4CAF50;
    --error-color: #f44336;
    --button-eye-bg: #f0f0f0;
    --button-eye-hover: #e0e0e0;
}

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);
    --form-background: rgba(31, 63, 51, 0.95);
    --button-eye-bg: #2F5A47;
    --button-eye-hover: #3A6F57;
}

body {
    background: var(--background-color);
    background-image: var(--background-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;

    font-family: 'Segoe UI', sans-serif;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

html {
    scroll-behavior: smooth;
}

h2 {
    text-align: center;
    color: var(--primary-color);
    font-size: 32px;
    font-family: 'Great Vibes', cursive;
    margin-bottom: 30px;
    margin-top: 80px;
    font-weight: normal;
    letter-spacing: 1px;
}

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

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

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
    color: var(--text-color);
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    margin-top: 5px;
    border: 2px solid var(--input-border);
    border-radius: 10px;
    box-sizing: border-box;
    background: var(--input-background);
    color: var(--text-color);
    font-size: 14px;
    transition: all 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 8px rgba(95, 191, 152, 0.3);
}

.password-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
}

.password-container input {
    flex: 1;
}

.toggle-password-btn {
    background: var(--button-eye-bg);
    border: 2px solid var(--input-border);
    border-radius: 10px;
    padding: 10px 12px;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.3s ease;
    color: var(--text-color);
    margin-top: 5px;
}

.toggle-password-btn:hover {
    background: var(--button-eye-hover);
    transform: scale(1.05);
}

.toggle-password-btn:active {
    transform: scale(0.95);
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 20px auto;
    max-width: 450px;
    width: 90%;
}

li {
    padding: 12px 20px;
    border-radius: 10px;
    text-align: center;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 10px;
    animation: slideDown 0.3s ease-out;
}

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

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

li.error {
    background-color: var(--error-color);
    color: white;
}

button[type="submit"] {
    width: 100%;
    padding: 12px;
    margin-top: 25px;
    background: linear-gradient(to right, var(--button-gradient-start), var(--button-gradient-end));
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: bold;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

button[type="submit"]:hover {
    background: linear-gradient(to right, var(--button-hover-gradient-start), var(--button-hover-gradient-end));
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

button[type="submit"]:active {
    transform: translateY(0);
}

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

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

.login-link a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.btn1 {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(to right, var(--button-gradient-start), var(--button-gradient-end));
    color: white;
    padding: 10px 15px;
    font-size: 15px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    box-shadow: 0px 6px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    border: none;
}

.btn1:hover {
    background: linear-gradient(to right, var(--button-hover-gradient-start), var(--button-hover-gradient-end));
    transform: translateY(-3px);
    box-shadow: 0px 8px 15px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    h2 {
        font-size: 28px;
        margin-top: 70px;
    }

    form {
        padding: 30px 25px;
        margin: 15px 20px;
        width: auto;
    }

    input[type="text"],
    input[type="email"],
    input[type="password"] {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    h2 {
        font-size: 24px;
        margin-top: 60px;
    }

    form {
        padding: 25px 20px;
        margin: 10px 15px;
    }

    label {
        font-size: 14px;
    }

    input[type="text"],
    input[type="email"],
    input[type="password"] {
        padding: 8px;
        font-size: 13px;
    }

    button[type="submit"] {
        padding: 10px;
        font-size: 14px;
    }

    .toggle-password-btn {
        padding: 8px 10px;
        font-size: 16px;
    }
}

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;
}