:root {
    font-size: 10px;
    --text-color: #293241;
    --header-text-color: #eee;
    --bkg-color: #fff;
    --nav-bkg-color: #f7f7f7;
    --header-bkg-color: #3d5a80;
    --form-bkg-color: #f7f7f7;
    --hover-color: #ebe9e9;
    --helper-color: rgb(238, 108, 77);
    color: var(--text-color);
}

:root.dark-theme {
    --text-color: #eee;
    --header-text-color: #fff;
    --bkg-color: #121212;
    --nav-bkg-color: #121212;
    --header-bkg-color: #222;
    --form-bkg-color: #222;
    --hover-color: #222;
    --helper-color: #c3073f;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;

    /* no text focus */
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
    -khtml-user-select: none; /* Konqueror HTML */
    -moz-user-select: none; /* Old versions of Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    user-select: none; /* Non-prefixed version, currently
                                    supported by Chrome, Edge, Opera and Firefox */
}

.outer-container {
    display: flex;
    flex-direction: column;
    background-color: var(--bkg-color);
    min-height: 100vh;
}

/* Header Section*/
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 95rem;
    height: 6rem;
    padding: 2rem 4rem;
    padding-right: 0;
    background-color: var(--header-bkg-color);
    color: var(--header-text-color);
}

h1 {
    font-size: 3.5rem;
    min-width: 20rem;
}

.account-section {
    position: relative;
    width: 5vw;
    min-width: 15rem;
    display: flex;
    justify-content: center;
    color: var(--header-text-color);
}

.login-btn,
.account-btn {
    background-color: transparent;
    border: none;
    font-size: 1.4rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    color: var(--header-text-color);
}

.login-btn:hover,
.account-btn:hover {
    color: #e0fbfc;
}

.account-section:hover .account-btn + .dropdown-list {
    display: flex;
}

.dropdown-list {
    list-style: none;
    position: absolute;
    top: 90%;
    left: 10%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    font-size: 1.2rem;
    background-color: var(--header-bkg-color);
    color: var(--header-text-color);
    width: 90%;
    min-width: 90%;
    padding: 2rem;
    height: 10rem;
}

.dropdown-arrow-icon {
    height: 2rem;
    width: 2rem;
    fill: var(--header-text-color);
}

.dropdown-list-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    width: 100%;
    min-width: 100%;
    cursor: pointer;
}

.dropdown-list img,
.dropdown-list svg {
    width: 2rem;
    height: 2rem;
}

.dropdown-list {
    display: none;
}

.theme-mode-switch-btn,
.logout-btn {
    border: none;
    font-size: 1.1rem;
    font-weight: 500;
    display: Flex;
    gap: 0.6rem;
    align-items: center;
    cursor: pointer;
    width: 100%;
    min-width: 100%;
    background-color: transparent;
    color: var(--header-text-color);
}

.theme-mode-switch-btn:hover .theme-mode-icon {
    filter: invert(45%) sepia(76%) saturate(3199%) hue-rotate(330deg)
        brightness(98%) contrast(90%);
}

:root.dark-theme .theme-mode-switch-btn:hover .theme-mode-icon {
    filter: invert(90%) sepia(86%) saturate(4939%) hue-rotate(334deg)
        brightness(102%) contrast(101%);
}

.theme-mode-switch-btn:hover,
.logout-btn:hover {
    color: var(--helper-color);
}

/* Login Section */
.form {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 35rem;
    height: 30rem;
    gap: 2rem;
    border: 1px solid var(--text-color);
    padding: 2rem;
    border-radius: 1rem;
    background-color: var(--form-bkg-color);
    position: fixed;
    min-width: 30rem;
    margin-bottom: 10rem;
}

:root.dark-theme .form {
    border-color: gray;
}

.form-close-btn {
    height: 2rem;
    width: 2rem;
    position: absolute;
    left: 99%;
    top: 1%;
    transform: translate(-110%, 10%);
    background-color: transparent;
    border: none;
    cursor: pointer;
}

.form-close-btn svg {
    fill: var(--header-bkg-color);
}

:root.dark-theme .form-close-btn svg {
    fill: var(--text-color);
}

.username-input,
.signup-username-input {
    padding: 1rem;
    border-radius: 0.6rem;
    border: 1px solid rgb(143, 143, 143);
}

.username-input:focus,
.signup-username-input:focus {
    outline: none;
}

.username-error,
.signup-username-error {
    color: #e90f50;
    align-self: center;
    font-size: 1.2rem;
}

.sign-up-section {
    color: var(--text-color-color);
    justify-self: flex-end;
}

.login-form h2,
.signup-header {
    margin-bottom: 2rem;
    font-size: 2rem;
    color: var(--header-bkg-color);
}

:root.dark-theme .login-form h2,
:root.dark-theme .signup-header {
    color: #eee;
}

.form-login-btn,
.form-signup-btn {
    background-color: var(--header-bkg-color);
    border: none;
    border-radius: 1rem;
    width: 30%;
    align-self: center;
    padding: 0.5rem 1rem;
    color: #eee;
    cursor: pointer;
}

.form-signup-btn {
    margin-bottom: 3rem;
}

.form-login-btn:hover,
.form-signup-btn:hover {
    background-color: #5174a3;
}

:root.dark-theme .form-login-btn,
:root.dark-theme .form-signup-btn {
    background-color: var(--helper-color);
    color: #eee;
}

:root.dark-theme .form-login-btn:hover,
:root.dark-theme .form-signup-btn:hover {
    background-color: #e90f50;
}

.login-form div {
    display: flex;
    gap: 1rem;
    align-items: center;
    font-size: 1.2rem;
    justify-content: center;
}

.sign-up-btn {
    background-color: transparent;
    border: none;
    cursor: pointer;
    color: var(--helper-color);
    font-weight: 600;
}

.sign-up-btn:hover {
    color: rgb(255, 126, 94);
}

:root.dark-theme .sign-up-btn {
    color: #fff;
    color: var(--helper-color);
}

:root.dark-theme .sign-up-btn:hover {
    color: #e90f50;
}

/* Main Section */
main {
    display: flex;
    flex: 1;
}

/* Nav Section */
.nav {
    display: flex;
    flex-direction: column;
    background-color: var(--nav-bkg-color);
    width: 15vw;
    min-width: 23rem;
    color: var(--text-color);
    padding: 3rem;
    gap: 2rem;
}

:root.dark-theme .nav {
    border-right: 5px solid var(--header-bkg-color);
}

.nav-heading {
    padding: 1rem 2rem;
    border-radius: 1rem;
    cursor: pointer;
    width: 100%;
    display: flex;
    justify-content: left;
    align-items: center;
    font-weight: 500;
    display: flex;
    gap: 1.5rem;
    border: none;
    background-color: transparent;
    font-size: 1.4rem;
    color: var(--text-color);
}

.nav-heading:hover,
.clicked {
    background-color: var(--hover-color);
}

.nav-icon {
    width: 2rem;
    height: 2rem;
    fill: var(--text-color);
}

/* Todos Section */
.todos-section {
    width: 100%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin: 0 auto;
    margin-right: 30rem;
    margin-left: 5rem;
    min-width: 60rem;
}

.todo-container,
.add-todo-btn {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: 1.3rem;
    font-weight: 500;
    min-width: 60rem;
    padding: 1rem 2rem;
    border-radius: 1rem;
    width: 40%;
}

.todo-container:hover {
    background-color: var(--hover-color);
}

.todo-container-left {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
}

.todo-container-right {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.todo-container:hover .todo-edit {
    visibility: visible;
}

.todo-edit {
    height: 2rem;
    width: 6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--helper-color);
    background-color: transparent;
    border: none;
    border-radius: 0.6rem;
    padding: 1rem 3rem;
    cursor: pointer;
    font-size: 1.3rem;
    font-weight: 500;
    visibility: hidden;
}

.todo-edit:hover {
    background-color: var(--helper-color);
    color: #fff;
}

.todo-isCompleted {
    border-radius: 50%;
    height: 2rem;
    width: 2rem;
    background-color: transparent;
    cursor: pointer;
    border: 2px solid var(--helper-color);
}

.todo-isCompleted:hover {
    background-color: var(--helper-color);
}

.add-todo-btn {
    width: 40%;
    min-width: 60rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: left;
    background-color: transparent;
    border: none;
    padding: 2rem;
    color: var(--helper-color);
    font-weight: 600;
    cursor: pointer;
}

.add-todo-icon {
    height: 2rem;
    width: 2rem;
    fill: var(--helper-color);
}

.todo-content {
    color: var(--text-color);
    width: 30rem;
    word-wrap: break-word;
}

.add-todo-btn:hover {
    background-color: var(--hover-color);
}

/* Add todo form section */
.add-todo-form-container {
    width: 40%;
    min-width: 60rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.todo-form-input-container {
    display: flex;
    justify-content: stretch;
}

.add-todo-form-name-input,
.add-todo-form-date-input {
    padding: 1.5rem;
    height: 3rem;
    border: 1px solid #4e4e50;
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    font-weight: 500;
    font-size: 1.4rem;
}

:root.dark-theme .add-todo-form-name-input,
:root.dark-theme .add-todo-form-date-input {
    background-color: #4e4e50;
    border-color: #444;
}

.add-todo-form-name-input {
    border-right: none;
    border-top-left-radius: 1rem;
    border-bottom-left-radius: 1rem;
    flex: 5;
}

.add-todo-form-date-input {
    border-left: none;
    border-top-right-radius: 1rem;
    border-bottom-right-radius: 1rem;
    flex: 2;
    display: flex;
    text-align: right;
}

:root.dark-theme .add-todo-form-date-input {
    color-scheme: dark;
}

.add-todo-form-name-input:focus,
.add-todo-form-date-input:focus {
    outline: none;
}

.todo-form-btn-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    width: 100%;
}

.form-btn-add-edit,
.form-btn-cancel {
    flex: 1;
    border-radius: 0.7rem;
    border: 1px solid var(--text-color);
    padding: 0.3rem 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

:root.dark-theme .form-btn-add-edit,
:root.dark-theme .form-btn-cancel {
    border-color: #222;
}

.form-btn-add-edit {
    background-color: var(--helper-color);
    color: #fff;
}

.form-btn-add-edit:hover {
    background-color: rgb(255, 126, 94);
}

:root.dark-theme .form-btn-add-edit:hover {
    background-color: #e90f50;
}

.form-btn-cancel {
    background-color: var(--header-bkg-color);
    color: var(--header-text-color);
}

.form-btn-cancel:hover {
    background-color: #5174a3;
}

:root.dark-theme .form-btn-cancel:hover {
    background-color: #333;
}

/* Edit todo form */
.edit-todo-form {
    height: 18rem;
    margin-bottom: 30rem;
    border-color: #4e4e50;
}

.edit-todo-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    justify-content: space-between;
    width: 100%;
    height: 100%;
}

.edit-todo-content-input {
    margin-bottom: -1.5rem;
}

.edit-todo-content-input,
.edit-todo-date-input {
    padding: 0.6rem 1rem;
    height: 3.5rem;
    color: var(--text-color);
    font-size: 1.3rem;
    font-family: 'Roboto', sans-serif;
    border-radius: 1rem;
    border: 1px solid #4e5e50;
    font-weight: 500;
}

:root.dark-theme .edit-todo-content-input,
:root.dark-theme .edit-todo-date-input {
    color: #222;
}

.edit-todo-content-input:focus,
.edit-todo-date-input:focus {
    outline: none;
}

:root.dark-theme .cancel-todo-form-btn {
    background-color: #444;
}

/* Overlay settings for forms */
.overlay {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    height: 100%;
    width: 100%;
    z-index: 8000;
    background-color: transparent;
    backdrop-filter: blur(6px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    box-shadow: 2px 2px 25px 2px rgba(0, 0, 0, 0.199);
}

.hidden {
    visibility: hidden;
}

/* Loading icon*/
.loader {
    border: 16px solid var(--header-bkg-color);
    border-top: 16px solid var(--helper-color);
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    animation: spin 2s linear infinite;
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, -10%);
}

@keyframes spin {
    0% {
        transform: translate(-50%, -10%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -10%) rotate(360deg);
    }
}