:root {
    --font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

    --background-color: #f6f7fb;
    --secondary-background-color: #ffffff;
    --task-card-background-color: #ffffff;

    --border-color: #dbe1ea;
    --text-color: #0f172a;
    --secondary-text-color: #475569;

    --primary-color: #2563eb;
    --primary-color-hover: #1d4ed8;
    --secondary-color-hover: rgba(37, 99, 235, 0.15);

    --header-background-color: #0b1220;
    --header-background-color-menu: #111a2e;
    --header-background-color-secondary: var(--primary-color);
    --header-background-color-secondary-hover: var(--primary-color-hover);

    --disabled-background-color: #e2e8f0;
    --disabled-text-color: #64748b;
    --disabled-border-color: #cbd5e1;

    --danger-bg: rgba(220, 38, 38, 0.12);
    --danger-border: rgba(235, 70, 84, 0.726);
    --danger-text: #b91c1c;

    --font-size-base: 1em;
    --font-size-very-small: 0.75em;
    --font-size-small: 0.85em;
    --font-size-medium: 0.95em;
    --font-size-medium-big: 1.2em;
    --font-size-large: 1.8em;
    --font-size-title: 2.25em;

    --spacing-small: 0.5em;
    --spacing-medium: 1em;
    --spacing-large: 1.5em;

    --border-radius: 0.75em;
    --shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] {
    --background-color: #282c34;
    --secondary-background-color: #21252b;
    --task-card-background-color: #2c313c;

    --border-color: #3e4451;
    --text-color: #abb2bf;
    --secondary-text-color: #9aa3b2;

    --primary-color: #61afef;
    --primary-color-hover: #4aa3ef;
    --secondary-color-hover: rgba(97, 175, 239, 0.18);

    --header-background-color: #21252b;
    --header-background-color-menu: #2c313c;

    --disabled-background-color: rgba(171, 178, 191, 0.12);
    --disabled-text-color: rgba(171, 178, 191, 0.6);
    --disabled-border-color: rgba(171, 178, 191, 0.2);

    --danger-bg: rgba(224, 108, 117, 0.14);
    --danger-border: rgba(235, 70, 84, 0.726);
    --danger-text: #e06c75;

    --shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    margin: 0;
    padding: var(--spacing-medium);
    background-color: var(--background-color);
    color: var(--text-color);
}

a {
    color: var(--primary-color);
}

h1 {
    text-align: center;
    font-size: var(--font-size-large);
    color: var(--text-color);
}

.form-container {
    max-width: 56.25em;
    margin: auto;
    background: var(--secondary-background-color);
    padding: var(--spacing-medium);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    align-items: center;
    padding: var(--spacing-small);
    gap: var(--spacing-small);
}

.header-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0;
}

#language-select {
    width: auto;
}

#version-group {
    text-align: right;
    font-size: var(--font-size-small);
    color: var(--secondary-text-color);
    justify-self: end;
    grid-row: 2;
    grid-column: 1;
    margin-right: auto;
}

#theme-toggle-container {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;

}

.form-group {
    margin-bottom: var(--spacing-medium);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-small);
    font-weight: 600;
    color: var(--secondary-text-color);
}

.row-align-no-space {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1em;
}

.row-align {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1em;
}

.form-group .inline-checkbox {
    display: flex;
    align-items: center;
    font-weight: 600;
    white-space: nowrap;
    margin-bottom: 0px;
}

input,
select,
textarea {
    background-color: var(--task-card-background-color);
    width: 100%;
    padding: 0.45em 0.6em;
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius) - 0.25em);
    box-sizing: border-box;
    color: var(--text-color);
}

textarea {
    resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--secondary-color-hover);
    border-color: var(--primary-color);
}

.field-invalid {
    border-color: var(--danger-border);
}

input:required:invalid:not(:disabled):not([readonly]),
select:required:invalid:not(:disabled),
textarea:required:invalid:not(:disabled):not([readonly]),
input.field-invalid:not(:disabled):not([readonly]),
select.field-invalid:not(:disabled),
textarea.field-invalid:not(:disabled):not([readonly]) {
    border-color: var(--danger-border);
    box-shadow: 0 0 0 2px var(--danger-bg);
}

input:required:invalid:focus:not(:disabled):not([readonly]),
select:required:invalid:focus:not(:disabled),
textarea:required:invalid:focus:not(:disabled):not([readonly]),
input.field-invalid:focus:not(:disabled):not([readonly]),
select.field-invalid:focus:not(:disabled),
textarea.field-invalid:focus:not(:disabled):not([readonly]) {
    outline: 2px solid var(--danger-border);
    border-color: var(--danger-border);
}

input[type="checkbox"] {
    width: auto;
    margin: 0 var(--spacing-small) 0 0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14em, 1fr));
    gap: var(--spacing-small);
    margin-bottom: var(--spacing-large);
}

.form-grid-item {
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

.inline-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
    flex-direction: row;
}

.bordered-section {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-small);
    margin-bottom: var(--spacing-large);
    background: color-mix(in srgb, var(--secondary-background-color) 85%, var(--background-color));
}

.required {
    color: var(--danger-text);
}

button {
    font-size: var(--font-size-base);
    padding: 0.55em 1.1em;
    background-color: var(--primary-color);
    color: white;
    border: 1px solid transparent;
    border-radius: calc(var(--border-radius) - 0.25em);
    cursor: pointer;
    margin-bottom: var(--spacing-small);
}

button:hover {
    background-color: var(--primary-color-hover);
}

button:disabled {
    background-color: var(--disabled-background-color);
    color: var(--disabled-text-color);
    cursor: not-allowed;
    opacity: 0.85;
}

.delete-button {
    background-color: #dc2626;
}

.delete-button:hover {
    background-color: #b91c1c;
}

.secondary-button {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.secondary-button:hover {
    background-color: var(--secondary-color-hover);
}

.button-group {
    text-align: center;
}

.separator {
    margin: 20px 0;
    width: 100%;
}

[data-theme="dark"] ::-webkit-calendar-picker-indicator {
    filter: invert(1);
    opacity: 0.85;
}

/* Toasts */
.toast-container {
    position: fixed;
    right: 14px;
    bottom: 14px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: min(420px, 92vw);
}

.toast {
    background: var(--secondary-background-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: calc(var(--border-radius) - 0.25em);
    box-shadow: var(--shadow);
    padding: 0.75em 0.85em;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.6em;
    transform: translateY(6px);
    opacity: 0;
    transition: transform 180ms ease, opacity 180ms ease;
}

.toast.toast-in {
    transform: translateY(0);
    opacity: 1;
}

.toast.toast-out {
    transform: translateY(6px);
    opacity: 0;
}

.toast-success {
    border-left-color: #22c55e;
}

.toast-warning {
    border-left-color: #f59e0b;
}

.toast-error {
    border-left-color: #ef4444;
}

.toast-close {
    background: transparent !important;
    border: 0 !important;
    color: var(--secondary-text-color) !important;
    padding: 0 !important;
    width: 28px;
    height: 28px;
    font-size: 20px;
    line-height: 28px;
    cursor: pointer;
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 2500;
    background: rgba(0, 0, 0, 0.35);
    display: grid;
    place-items: center;
}

.loading-card {
    background: var(--secondary-background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 0.9em 1.1em;
    display: flex;
    align-items: center;
    gap: 0.75em;
    min-width: 240px;
}

.loader {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: digidoc-spin 0.8s linear infinite;
}

@keyframes digidoc-spin {
    to {
        transform: rotate(360deg);
    }
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2600;
    background: rgba(0, 0, 0, 0.45);
    display: grid;
    place-items: center;
    padding: 16px;
}

.modal-card {
    width: min(720px, 96vw);
    background: var(--secondary-background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85em 1em;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-weight: 700;
}

.modal-close {
    background: transparent !important;
    border: 0 !important;
    color: var(--secondary-text-color) !important;
    width: 34px;
    height: 34px;
    font-size: 22px;
    cursor: pointer;
}

.modal-body {
    padding: 1em;
    color: var(--text-color);
}

.modal-details {
    padding: 0 1em 1em 1em;
}

.modal-pre {
    background: var(--task-card-background-color);
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius) - 0.25em);
    padding: 0.75em;
    overflow: auto;
    max-height: 40vh;
}

.modal-actions {
    padding: 0 1em 1em 1em;
    display: flex;
    justify-content: flex-end;
    gap: 0.5em;
}

@media (max-width: 768px) {
    body {
        padding: 0;
        background-color: var(--secondary-background-color);
    }

    .form-container {
        padding: var(--spacing-medium);
        border-radius: 0;
        box-shadow: none;
        border: 0;
    }
}