/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background-color: var(--bg-active);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-tertiary);
}
::-webkit-scrollbar-corner {
    background: transparent;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: 1.3;
    color: var(--text-primary);
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { color: var(--text-secondary); }

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover { color: var(--accent-primary-hover); }

/* Lists */
ul, ol { list-style: none; }

/* Forms */
input, textarea, select, button {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    outline: none;
}

input[type="text"],
input[type="date"],
input[type="number"],
textarea,
select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    width: 100%;
}
input[type="text"]:focus,
input[type="date"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-bg);
}

input[type="text"]::placeholder,
textarea::placeholder {
    color: var(--text-tertiary);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a1a1aa' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* Utility classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.fade-in {
    animation: fadeIn var(--transition-normal) ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(16px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Selection */
::selection {
    background-color: var(--accent-primary);
    color: white;
}

/* ── Viewer Mode — hide all write/edit controls ── */
body.viewer-mode .add-system-row,
body.viewer-mode .add-component-row,
body.viewer-mode .add-component-btn,
body.viewer-mode .task-add-row,
body.viewer-mode .dep-add-row,
body.viewer-mode .tree-system-actions,
body.viewer-mode .tree-component-actions,
body.viewer-mode .template-item-actions {
    display: none !important;
}

/* Hide buttons that trigger write actions */
body.viewer-mode .detail-section-header .btn,
body.viewer-mode .detail-gantt-info .btn {
    display: none !important;
}

/* Make status/priority selects read-only for viewers */
body.viewer-mode select.detail-status-select,
body.viewer-mode select.detail-priority-select {
    pointer-events: none;
    opacity: 0.7;
}

/* Disable notes textarea for viewers */
body.viewer-mode .detail-notes-textarea {
    pointer-events: none;
    opacity: 0.7;
}

/* Disable date inputs for viewers */
body.viewer-mode input[type="date"] {
    pointer-events: none;
    opacity: 0.7;
}

/* Disable task checkboxes for viewers */
body.viewer-mode .task-checkbox {
    pointer-events: none;
    opacity: 0.7;
}

/* Hide project management header buttons (New Project, Modify Templates, Add Project) */
body.viewer-mode .view-header .btn-primary,
body.viewer-mode .view-header .btn-secondary {
    display: none !important;
}

/* Hide drag handles for viewers */
body.viewer-mode .drag-handle {
    display: none !important;
}

/* Hide context menu write options (handled via JS but just in case) */
body.viewer-mode .context-menu-danger,
body.viewer-mode .context-menu-item[data-action="delete"],
body.viewer-mode .context-menu-item[data-action="rename"] {
    display: none !important;
}

/* Hide Gantt write-action controls for viewers (targeted by data attribute) */
body.viewer-mode [data-gantt-action="add"],
body.viewer-mode [data-gantt-action="link"],
body.viewer-mode .gantt-add-form {
    display: none !important;
}

/* Make Gantt bars non-draggable for viewers */
body.viewer-mode .gantt-bar {
    cursor: default !important;
}
body.viewer-mode .gantt-bar-handle {
    display: none !important;
}

/* Viewer mode indicator — subtle bottom-right badge */
body.viewer-mode::after {
    content: '\1F512 View Only';
    position: fixed;
    bottom: 8px;
    right: 8px;
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-color);
    color: var(--text-tertiary);
    font-size: 11px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    z-index: 9999;
    pointer-events: none;
}