@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

    --page: #f9f9f7;
    --card: #ffffff;
    --text: #16160f;
    --text-secondary: #52514e;
    --muted: #8a887f;
    --border: rgba(11, 11, 11, 0.09);
    --border-strong: rgba(11, 11, 11, 0.16);

    --ink: #16160f;
    --ink-hover: #302f26;
    --accent: #2a78d6;
    --accent-hover: #1c5cab;
    --accent-soft: #eaf2fc;
    --danger: #d03b3b;
    --danger-hover: #b52f2f;
    --danger-soft: #fbecec;
    --success: #0ca30c;
    --success-soft: #e7f6e3;

    --gantt-grid-day: #eeede6;
    --gantt-grid-week: #dfddd3;

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(22, 22, 15, 0.05);
    --shadow: 0 2px 10px rgba(22, 22, 15, 0.06), 0 1px 2px rgba(22, 22, 15, 0.05);
    --shadow-lg: 0 16px 40px rgba(22, 22, 15, 0.12), 0 2px 8px rgba(22, 22, 15, 0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--page);
    color: var(--text);
    font-size: 14px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-full { max-width: none; padding: 0 32px; }

.muted { color: var(--muted); }

/* Nav */
.topnav { background: var(--card); border-bottom: 1px solid var(--border); }
.topnav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 15px; letter-spacing: -0.01em; color: var(--text); }
.brand:hover { text-decoration: none; color: var(--text); }
.brand-mark { display: inline-flex; width: 22px; height: 22px; border-radius: 6px; background: var(--ink); align-items: center; justify-content: center; flex-shrink: 0; }
.brand-mark svg { display: block; }
.topnav-links { display: flex; gap: 24px; align-items: center; }
.topnav-links a { color: var(--muted); font-weight: 500; font-size: 13.5px; }
.topnav-links a:hover { color: var(--text); text-decoration: none; }

/* Layout */
main.container { padding-top: 32px; padding-bottom: 64px; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { margin: 0; font-size: 21px; letter-spacing: -0.01em; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    border: 1px solid transparent; border-radius: var(--radius-sm); padding: 8px 14px;
    font: inherit; font-size: 13.5px; font-weight: 600; cursor: pointer; background: var(--card);
    color: var(--text); transition: background .12s ease, border-color .12s ease, color .12s ease, box-shadow .12s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--ink-hover); border-color: var(--ink-hover); }
.btn-secondary { background: var(--card); border-color: var(--border-strong); color: var(--text); }
.btn-secondary:hover { background: var(--page); border-color: var(--border-strong); }
.btn-link { background: transparent; border-color: transparent; color: var(--accent); padding: 8px 6px; font-weight: 600; }
.btn-link:hover { color: var(--accent-hover); background: transparent; }
.btn-danger { color: var(--danger); }
.btn-danger:hover { color: var(--danger-hover); }
.btn-block { width: 100%; }
.btn-icon { padding: 5px 11px; font-size: 15px; line-height: 1; border-color: var(--border-strong); }
.btn-icon:hover { background: var(--page); }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }

/* Cards / grid */
.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.project-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow-sm); transition: box-shadow .15s ease, border-color .15s ease; }
.project-card:hover { box-shadow: var(--shadow); border-color: var(--border-strong); }
.project-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.project-card h2 { margin: 0 0 4px; font-size: 16.5px; letter-spacing: -0.01em; }
.status-summary { font-size: 13px; color: var(--text-secondary); background: var(--page); border-radius: var(--radius-sm); padding: 9px 11px; margin: 10px 0; line-height: 1.5; }
.project-card-actions { display: flex; align-items: center; gap: 2px; margin-top: 14px; flex-wrap: wrap; }

.badge { font-size: 10.5px; font-weight: 700; padding: 3px 9px; border-radius: 999px; white-space: nowrap; letter-spacing: .01em; }
.badge-on { background: var(--success-soft); color: var(--success); }
.badge-off { background: var(--page); color: var(--muted); }

.empty-state { background: var(--card); border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); padding: 48px; text-align: center; color: var(--muted); }

/* Auth pages */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--page); }
.auth-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 34px; width: 360px; }
.auth-card h1 { margin: 0 0 4px; font-size: 19px; letter-spacing: -0.01em; }
.auth-card form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.auth-card label { font-size: 13px; font-weight: 600; color: var(--text-secondary); display: flex; flex-direction: column; gap: 6px; }

label { font-size: 13px; font-weight: 600; color: var(--text-secondary); display: flex; flex-direction: column; gap: 6px; }

input[type="text"], input[type="password"], input[type="date"], input[type="number"], textarea, select {
    font: inherit; font-size: 13.5px; padding: 9px 11px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
    color: var(--text); background: #fff; transition: border-color .12s ease, box-shadow .12s ease;
}
input:focus, textarea:focus, select:focus {
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { resize: vertical; min-height: 70px; }

.alert { padding: 10px 12px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 4px; }
.alert-error { background: var(--danger-soft); color: var(--danger-hover); }
.alert-success { background: var(--success-soft); color: var(--success); }

/* Modal */
.modal-backdrop {
    position: fixed; inset: 0; background: rgba(20, 19, 14, 0.5); backdrop-filter: blur(1px);
    display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.modal-backdrop[hidden] { display: none; }
.modal { background: var(--card); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 26px; width: 460px; max-width: 100%; max-height: 88vh; overflow-y: auto; }
.modal h2 { margin: 0 0 16px; font-size: 17px; letter-spacing: -0.01em; }
.modal form { display: flex; flex-direction: column; gap: 14px; }
.modal-row { display: flex; gap: 12px; }
.modal-row > label { flex: 1; }
.modal-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 6px; gap: 8px; }
.modal-actions-right { display: flex; gap: 8px; margin-left: auto; }
.checkbox-row { flex-direction: row !important; align-items: center; gap: 8px !important; }
.checkbox-row input { width: auto; }

.color-row { display: flex; gap: 9px; flex-wrap: wrap; }
.color-swatch { width: 24px; height: 24px; border-radius: 50%; border: 2px solid transparent; box-shadow: 0 0 0 1px var(--border); cursor: pointer; transition: transform .1s ease; }
.color-swatch:hover { transform: scale(1.1); }
.color-swatch.selected { border-color: var(--card); box-shadow: 0 0 0 2px var(--ink); }

/* Toasts */
#toastContainer { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 200; }
.toast { background: var(--ink); color: #fff; padding: 10px 16px; border-radius: var(--radius-sm); font-size: 13px; box-shadow: var(--shadow-lg); opacity: 0; transform: translateY(6px); transition: opacity .15s, transform .15s; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.toast-error { background: var(--danger-hover); }

/* Project header (project.php / view.php) */
.project-hero { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px 24px; margin-bottom: 20px; box-shadow: var(--shadow-sm); }
.project-hero-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.project-hero h1 { margin: 0 0 2px; font-size: 21px; letter-spacing: -0.01em; }
.project-hero .client { color: var(--muted); font-size: 13px; margin: 0; }
.public-link-box { display: flex; align-items: center; gap: 8px; background: var(--page); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 7px 7px 7px 13px; font-size: 12px; }
.public-link-box code { color: var(--text-secondary); word-break: break-all; }

.status-editor { margin-top: 16px; }
.status-editor textarea { width: 100%; }

/* Gantt component */
.gantt { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
.gantt-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.gantt-zoom { display: flex; gap: 4px; }
.gantt-scroll { overflow: auto; max-height: 65vh; }
.container-full .gantt-scroll { max-height: 74vh; }
.gantt-content { position: relative; }

.gantt-header-row { display: flex; position: sticky; top: 0; z-index: 20; background: var(--card); }
.gantt-header-sidebar {
    position: sticky; left: 0; z-index: 21; background: var(--card);
    border-right: 1px solid var(--border); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; padding: 0 16px; font-weight: 700; font-size: 11px; color: var(--muted);
    text-transform: uppercase; letter-spacing: .05em; flex-shrink: 0;
}
.gantt-header-timeline { border-bottom: 1px solid var(--border); flex-shrink: 0; }
.gantt-months { display: flex; height: 26px; border-bottom: 1px solid var(--border); }
.gantt-month-cell { font-size: 11px; font-weight: 600; color: var(--text-secondary); padding: 5px 0 0 8px; border-right: 1px solid var(--border); white-space: nowrap; overflow: hidden; letter-spacing: -.01em; }
.gantt-ticks { position: relative; height: 22px; }
.gantt-tick { position: absolute; top: 4px; font-size: 10.5px; color: var(--muted); white-space: nowrap; padding-left: 5px; border-left: 1px solid var(--gantt-grid-week); }

.gantt-body-row { display: flex; position: relative; }
.gantt-sidebar-col { position: sticky; left: 0; z-index: 10; background: var(--card); border-right: 1px solid var(--border); flex-shrink: 0; }
.gantt-row-sidebar { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 0 16px; border-bottom: 1px solid var(--border); font-size: 13px; background: var(--card); transition: background .1s ease; }
.gantt-row-sidebar[data-task-id]:hover { background: var(--page); }
.gantt-row-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gantt-row-progress { color: var(--muted); font-size: 11px; font-weight: 600; flex-shrink: 0; }
.gantt-group-label { font-weight: 700; background: var(--page); text-transform: uppercase; font-size: 10.5px; letter-spacing: .06em; color: var(--muted); }
.gantt-add-row { color: var(--accent); cursor: pointer; font-weight: 600; justify-content: flex-start; }
.gantt-add-row:hover { background: var(--page); color: var(--accent-hover); }

.gantt-timeline-col { position: relative; flex-shrink: 0; }
.gantt-row-timeline { position: absolute; left: 0; border-bottom: 1px solid var(--border); }
.gantt-group-band { background: rgba(11, 11, 11, 0.014); }

.gantt-bar {
    position: absolute; top: 7px; height: 22px; border-radius: 999px; overflow: hidden;
    display: flex; align-items: center; cursor: pointer; box-shadow: 0 1px 2px rgba(22, 22, 15, 0.18);
    transition: filter .1s ease, box-shadow .1s ease;
}
.gantt-bar:hover { filter: brightness(1.05); box-shadow: 0 2px 6px rgba(22, 22, 15, 0.24); }
.gantt-bar.is-editable { cursor: grab; }
.gantt-bar-fill { position: absolute; left: 0; top: 0; bottom: 0; background: rgba(255,255,255,0.32); }
.gantt-handle { position: absolute; top: 0; bottom: 0; width: 9px; cursor: ew-resize; }
.gantt-handle-left { left: 0; }
.gantt-handle-right { right: 0; }

.gantt-milestone {
    position: absolute; top: 9px; width: 16px; height: 16px; transform: translateX(-8px) rotate(45deg);
    border-radius: 4px; cursor: pointer; box-shadow: 0 1px 3px rgba(22, 22, 15, 0.25), inset 0 0 0 1px rgba(255,255,255,0.25);
}

.gantt-today { position: absolute; top: 0; bottom: 0; width: 0; border-left: 1.5px dashed var(--danger); z-index: 5; }
.gantt-today span {
    position: absolute; top: -8px; left: 0; transform: translateX(-50%);
    font-size: 9.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: #fff;
    background: var(--danger); padding: 2px 6px; border-radius: 999px; white-space: nowrap;
}

.gantt-tooltip {
    position: fixed; z-index: 300; background: var(--ink); color: #fff; padding: 8px 11px; border-radius: var(--radius-sm);
    font-size: 12px; line-height: 1.45; box-shadow: var(--shadow-lg); pointer-events: none; max-width: 240px;
    opacity: 0; transform: translate(-50%, calc(-100% + 4px)); transition: opacity .1s ease, transform .1s ease;
}
.gantt-tooltip.show { opacity: 1; transform: translate(-50%, -100%); }
.gantt-tooltip .tt-title { font-weight: 600; margin-bottom: 2px; }
.gantt-tooltip .tt-meta { color: rgba(255,255,255,0.72); }

/* Status updates log */
.updates-panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px 22px; margin-top: 20px; box-shadow: var(--shadow-sm); }
.updates-panel h2 { margin: 0 0 12px; font-size: 15px; letter-spacing: -0.01em; }
.update-form { display: flex; gap: 8px; margin-bottom: 18px; }
.update-form textarea { flex: 1; min-height: 44px; }
.update-item { border-bottom: 1px solid var(--border); padding: 12px 0; }
.update-item:last-child { border-bottom: none; }
.update-item .update-date { font-size: 11px; color: var(--muted); margin-bottom: 4px; font-weight: 600; }
.update-item .update-body { white-space: pre-wrap; color: var(--text-secondary); }
.update-item-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }

/* Public view */
.public-header { text-align: center; padding: 40px 16px 10px; }
.public-header h1 { margin: 0 0 4px; font-size: 24px; letter-spacing: -0.02em; }
.public-footer { text-align: center; color: var(--muted); font-size: 12px; padding: 32px 16px; }

@media (max-width: 640px) {
    .container { padding: 0 14px; }
    .modal { width: 100%; }
}