/* TODO App - Suckless Design
 * Design Principles:
 * - Dense, not sparse
 * - Expose state and inner workings
 * - Explicit is better than implicit
 * - Engineered for human vision and perception
 * - Flat, not hierarchical
 * - Timeless and unfashionable
 */

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - high contrast, functional */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --fg-primary: #000000;
    --fg-secondary: #333333;
    --fg-muted: #666666;

    /* Functional colors - incorporating original design */
    --color-primary: #2B5E2B;      /* Dark green from original */
    --color-secondary: #1A361A;    /* Darker green from original */
    --color-urgent: #C41E3A;       /* Red from original */
    --color-warning: #E94F37;      /* Orange-red from original */
    --color-ok: #2B5E2B;           /* Green for ok status */
    --color-info: #0066cc;
    --color-completed: #999999;
    --color-hover: #ffffb5;        /* Pale yellow hover from original */

    /* Borders */
    --border-thick: 2px solid #000000;
    --border-normal: 1px solid #333333;
    --border-light: 1px solid #cccccc;

    /* Spacing - dense layout */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;

    /* Typography */
    --font-family: 'Courier New', 'Courier', monospace;
    --font-size-base: 14px;
    --font-size-small: 12px;
    --font-size-large: 16px;
    --font-size-xl: 18px;

    /* Layout */
    --max-width: 95%;
    --max-width-desktop: 90%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.4;
    color: var(--fg-primary);
    background: var(--bg-secondary);
}

/* === SCREENS === */
.screen {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

#app-screen .app-main {
    flex: 1;
}

/* === LOGIN === */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: var(--space-xl);
    background: var(--bg-primary);
    border: var(--border-thick);
}

.login-container h1 {
    font-size: var(--font-size-xl);
    font-weight: bold;
    margin-bottom: var(--space-lg);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* === HEADER === */
.app-header {
    background: var(--bg-primary);
    border-bottom: var(--border-thick);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header h1 {
    font-size: var(--font-size-xl);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.header-info {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
    font-size: var(--font-size-small);
}

/* === MAIN CONTENT === */
.app-main {
    width: var(--max-width);
    max-width: 100%;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-xl);
}

@media (min-width: 1024px) {
    .app-main {
        width: var(--max-width-desktop);
        padding: var(--space-lg) var(--space-xl);
    }
}

section {
    background: var(--bg-primary);
    border: var(--border-normal);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
}

section h2 {
    font-size: var(--font-size-large);
    font-weight: bold;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: var(--border-light);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.section-header h2 {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.section-actions {
    display: flex;
    gap: var(--space-md);
}

/* === FORMS === */
.form-row {
    margin-bottom: var(--space-md);
}

.form-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-col {
    display: flex;
    flex-direction: column;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    font-size: var(--font-size-small);
}

input[type="text"],
input[type="password"],
input[type="date"],
textarea {
    width: 100%;
    padding: var(--space-sm);
    border: var(--border-normal);
    background: var(--bg-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
}

input:focus,
textarea:focus {
    outline: none;
    border: var(--border-thick);
}

textarea {
    resize: vertical;
    min-height: 60px;
}

.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

/* === BUTTONS === */
button {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    border: var(--border-normal);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-primary);
    color: var(--fg-primary);
}

button:hover {
    background: var(--bg-tertiary);
}

button:active {
    background: var(--fg-primary);
    color: var(--bg-primary);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--bg-primary);
    border: 2px solid var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-secondary {
    background: var(--bg-secondary);
}

.btn-text {
    background: transparent;
    border: none;
    padding: var(--space-xs) var(--space-sm);
    text-decoration: underline;
    color: var(--color-primary);
}

.btn-text:hover {
    background: var(--bg-secondary);
    text-decoration: none;
    color: var(--color-secondary);
}

.btn-danger {
    color: var(--color-urgent);
}

.btn-small {
    font-size: var(--font-size-small);
    padding: var(--space-xs) var(--space-sm);
}

/* === CALENDAR === */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.calendar-day {
    border: var(--border-light);
    padding: var(--space-sm);
    background: var(--bg-secondary);
    cursor: pointer;
}

.calendar-day:hover {
    background: var(--color-hover);
    border: 1px solid #cbcbcb;
}

.calendar-day.weekend {
    background: var(--bg-tertiary);
}

.day-header {
    font-weight: bold;
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    font-size: var(--font-size-small);
}

.day-stats {
    font-size: var(--font-size-small);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat-row {
    display: flex;
    justify-content: space-between;
}

.stat-pending {
    color: var(--color-urgent);
    font-weight: bold;
}

.stat-completed {
    color: var(--color-primary);
    font-weight: bold;
}

/* === TODO LIST === */
.todo-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.todo-item {
    border: var(--border-light);
    padding: var(--space-sm);
    background: var(--bg-secondary);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--space-md);
    align-items: start;
}

.todo-item:hover {
    background: var(--color-hover);
    border: var(--border-normal);
}

.todo-item.highlighted {
    background: var(--color-hover);
    /* Use outline instead of border to prevent layout shift */
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

/* Checkbox */
.todo-checkbox {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    cursor: pointer;
}

/* Content */
.todo-content {
    min-width: 0;
}

.todo-title {
    font-weight: bold;
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
    word-wrap: break-word;
    cursor: pointer;
}

.todo-title:hover {
    text-decoration: underline;
}

.todo-title.editing {
    text-decoration: none;
}

.todo-title.urgent {
    color: var(--color-urgent);
}

.todo-details {
    font-size: var(--font-size-small);
    color: var(--fg-secondary);
    margin-bottom: var(--space-xs);
    white-space: pre-wrap;
    word-wrap: break-word;
    cursor: pointer;
}

.todo-details:hover {
    background: var(--bg-tertiary);
}

.todo-details.editing {
    background: transparent;
}

.todo-details.empty {
    font-style: italic;
    color: var(--fg-muted);
}

.todo-meta {
    font-size: var(--font-size-small);
    color: var(--fg-muted);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* Actions */
.todo-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: flex-end;
}

.date-display {
    font-size: var(--font-size-small);
    font-weight: bold;
    cursor: pointer;
    padding: var(--space-xs);
    border: var(--border-light);
    text-align: right;
    min-width: 120px;
}

.date-display:hover {
    background: var(--bg-tertiary);
}

.date-display.overdue {
    color: var(--color-urgent);
    background: #ffeeee;
}

.date-display.warning {
    color: var(--color-warning);
    background: #fff5ee;
}

.date-display.ok {
    color: var(--color-primary);
}

.date-display.none {
    color: var(--fg-muted);
    font-style: italic;
}

/* Date Menu */
.date-menu {
    position: absolute;
    background: var(--bg-primary);
    border: var(--border-thick);
    padding: var(--space-xs);
    z-index: 100;
    right: 0;
    margin-top: var(--space-xs);
}

.date-menu-row {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: var(--space-xs);
    align-items: center;
    padding: var(--space-xs);
    border-bottom: var(--border-light);
}

.date-menu-row:last-child {
    border-bottom: none;
}

.date-menu-label {
    font-weight: bold;
    font-size: var(--font-size-small);
}

.date-menu-btn {
    background: var(--bg-secondary);
    border: var(--border-light);
    padding: var(--space-xs);
    cursor: pointer;
    min-width: 24px;
    text-align: center;
}

.date-menu-btn:hover {
    background: var(--bg-tertiary);
    border: var(--border-normal);
}

.date-menu-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Completed Items */
.completed-list .todo-item {
    opacity: 0.6;
}

.completed-list .todo-title {
    text-decoration: line-through;
    color: var(--color-completed);
}

/* === INLINE EDITING === */
.edit-input,
.edit-textarea {
    width: 100%;
    padding: var(--space-xs);
    border: var(--border-thick);
    background: var(--color-hover);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
}

.edit-textarea {
    min-height: 60px;
    resize: vertical;
}

.edit-actions {
    display: flex;
    gap: var(--space-xs);
    margin-top: var(--space-xs);
}

.edit-hint {
    font-size: var(--font-size-small);
    color: var(--fg-muted);
    margin-top: var(--space-xs);
}

/* === FOOTER === */
.app-footer {
    background: var(--bg-primary);
    border-top: var(--border-thick);
    padding: var(--space-sm) var(--space-lg);
    margin-top: auto;
    flex-shrink: 0;
}

.debug-info {
    width: var(--max-width);
    max-width: 100%;
    margin: 0 auto;
    font-size: var(--font-size-small);
    color: var(--fg-muted);
    display: flex;
    justify-content: space-between;
    gap: var(--space-md);
    padding: 0 var(--space-md);
}

@media (min-width: 1024px) {
    .debug-info {
        width: var(--max-width-desktop);
        padding: 0 var(--space-xl);
    }
}

/* === MESSAGES === */
.error-message {
    color: var(--color-urgent);
    font-weight: bold;
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    border: var(--border-normal);
    background: #ffeeee;
}

.error-inline {
    color: var(--color-urgent);
    font-weight: bold;
}

/* === UTILITY === */
.text-muted {
    color: var(--fg-muted);
}

.text-bold {
    font-weight: bold;
}

.text-upper {
    text-transform: uppercase;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    :root {
        --font-size-base: 13px;
        --space-lg: 12px;
    }

    .app-header {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-start;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .calendar-grid {
        grid-template-columns: 1fr;
    }

    .todo-item {
        grid-template-columns: auto 1fr;
    }

    .todo-actions {
        grid-column: 2;
        align-items: flex-start;
        margin-top: var(--space-xs);
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 12px;
        --space-md: 8px;
        --space-lg: 12px;
    }

    .app-main {
        padding: var(--space-sm);
    }
}

/* === PRINT === */
@media print {
    .app-header,
    .app-footer,
    .add-section,
    .calendar-section,
    .todo-actions,
    .section-actions {
        display: none !important;
    }

    .todo-item {
        page-break-inside: avoid;
    }
}