/* css/style.css */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #7c3aed;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --muted: #64748b;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* Nav */
nav {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    padding: 0;
    box-shadow: var(--shadow-md);
    position: sticky; top: 0; z-index: 200;
}
.nav-inner {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0 1.5rem;
}
.nav-brand {
    font-size: 1.15rem;
    font-weight: 700;
    padding: .9rem 0;
    color: #fff;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}
.nav-links {
    display: flex;
    gap: .15rem;
    list-style: none;
    align-items: center;
}

/* Top-level link (Dashboard) */
.nav-links > li > a {
    color: rgba(255,255,255,.85);
    text-decoration: none;
    padding: .55rem .9rem;
    border-radius: 6px;
    font-size: .88rem;
    font-weight: 500;
    transition: background .15s;
    display: block;
}
.nav-links > li > a:hover,
.nav-links > li > a.active {
    background: rgba(255,255,255,.2);
    color: #fff;
}

/* Dropdown trigger button */
.nav-drop-btn {
    background: none;
    border: none;
    color: rgba(255,255,255,.85);
    padding: .55rem .9rem;
    border-radius: 6px;
    font-size: .88rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .35rem;
    transition: background .15s;
    white-space: nowrap;
}
.nav-drop-btn:hover,
.nav-drop-btn.active {
    background: rgba(255,255,255,.2);
    color: #fff;
}
.nav-dropdown.is-open .nav-drop-btn {
    background: rgba(255,255,255,.2);
    color: #fff;
}
.nav-caret {
    font-size: .7rem;
    opacity: .8;
    transition: transform .2s;
}
.nav-dropdown.is-open .nav-caret { transform: rotate(180deg); }

/* Dropdown group with active page */
.nav-dropdown.open-group .nav-drop-btn {
    background: rgba(255,255,255,.15);
    color: #fff;
}

/* Submenu */
.nav-dropdown { position: relative; }
.nav-submenu {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,.15), 0 2px 8px rgba(0,0,0,.08);
    list-style: none;
    min-width: 190px;
    padding: .4rem;
    z-index: 300;
    border: 1px solid #e2e8f0;
}
.nav-dropdown.is-open .nav-submenu { display: block; }
.nav-submenu li a {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .55rem .85rem;
    border-radius: 7px;
    color: var(--text);
    text-decoration: none;
    font-size: .87rem;
    font-weight: 500;
    transition: background .12s;
    white-space: nowrap;
}
.nav-submenu li a:hover { background: #f1f5f9; }
.nav-submenu li a.active {
    background: #eff6ff;
    color: var(--primary);
    font-weight: 600;
}
.nav-submenu li a.active::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 14px;
    background: var(--primary);
    border-radius: 2px;
    margin-right: .15rem;
}

/* Layout */
.container { max-width: 1300px; margin: 0 auto; padding: 2rem 1.5rem; }

/* Cards */
.card {
    background: var(--card);
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
}
.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.card-title { font-size: 1.1rem; font-weight: 600; }
.card-body { padding: 1.5rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .5rem 1rem;
    border-radius: 7px;
    font-size: .875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all .15s;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--bg); }
.btn-warning { background: var(--warning); color: #fff; }
.btn-sm { padding: .3rem .7rem; font-size: .8rem; }
.btn-lg { padding: .75rem 1.5rem; font-size: 1rem; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { background: var(--bg); font-weight: 600; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; }
th, td { padding: .75rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8fafc; }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: .4rem; color: var(--text); }
input, select, textarea {
    width: 100%;
    padding: .5rem .75rem;
    border: 1px solid var(--border);
    border-radius: 7px;
    font-size: .9rem;
    color: var(--text);
    transition: border-color .15s, box-shadow .15s;
    background: #fff;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }

/* Alerts */
.alert {
    padding: .85rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: .9rem;
    font-weight: 500;
}
.alert-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* Schedule Grid */
.schedule-grid {
    display: grid;
    grid-template-columns: 100px repeat(7, 1fr);
    gap: 2px;
    background: var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.sg-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    padding: .6rem;
    text-align: center;
    font-weight: 600;
    font-size: .85rem;
}
.sg-time {
    background: #f1f5f9;
    padding: .6rem;
    font-size: .8rem;
    font-weight: 600;
    color: var(--muted);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sg-cell {
    background: #fff;
    padding: .4rem;
    min-height: 70px;
    vertical-align: top;
}
.sg-entry {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border: 1px solid #93c5fd;
    border-left: 3px solid var(--primary);
    border-radius: 6px;
    padding: .4rem .5rem;
    font-size: .78rem;
    margin-bottom: .25rem;
}
.sg-entry strong { display: block; color: var(--primary-dark); }
.sg-entry span { color: var(--muted); }
.sg-cell.lab .sg-entry {
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    border-color: #c4b5fd;
    border-left-color: var(--secondary);
}
.sg-cell.lab .sg-entry strong { color: var(--secondary); }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    box-shadow: var(--shadow);
}
.stat-num { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: .8rem; color: var(--muted); margin-top: .25rem; }

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: .2rem .6rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
}
.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-green { background: #dcfce7; color: #15803d; }
.badge-purple { background: #f5f3ff; color: #6d28d9; }
.badge-red { background: #fee2e2; color: #b91c1c; }

/* Page header */
.page-header { margin-bottom: 1.5rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.page-title { font-size: 1.5rem; font-weight: 700; }
.page-subtitle { color: var(--muted); font-size: .9rem; margin-top: .25rem; }

/* Log */
.log-entry { padding: .4rem .75rem; border-radius: 6px; font-size: .85rem; margin-bottom: .3rem; }
.log-INFO { background: #f0f9ff; border-left: 3px solid #38bdf8; }
.log-WARNING { background: #fffbeb; border-left: 3px solid #fbbf24; }
.log-ERROR { background: #fff1f2; border-left: 3px solid #fb7185; }

/* Scheduler result box */
.result-box { background: #f8fafc; border: 1px solid var(--border); border-radius: 10px; padding: 1.5rem; margin-top: 1.5rem; max-height: 400px; overflow-y: auto; }

/* Availability grid */
.av-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.av-grid { display: grid; grid-template-columns: 70px repeat(7, minmax(52px, 1fr)); gap: 3px; min-width: 520px; }
.av-header { background: var(--primary); color: #fff; padding: .35rem .25rem; text-align: center; border-radius: 5px; font-size: .72rem; font-weight: 600; }
.av-day { background: #f1f5f9; padding: .35rem .25rem; text-align: center; border-radius: 5px; font-size: .72rem; font-weight: 600; display: flex; align-items: center; justify-content: center; white-space: nowrap; }
.av-cell { display: flex; align-items: center; justify-content: center; padding: 2px 0; }
.av-cell input[type=checkbox] { width: 18px; height: 18px; cursor: pointer; accent-color: var(--primary); }

/* Tooltip */
[title] { cursor: help; }

/* ── Hamburger button ── */
.nav-burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px;
    border: none;
    background: rgba(255,255,255,.15);
    border-radius: 6px;
    cursor: pointer;
    margin-left: auto;
    flex-shrink: 0;
}
.nav-burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform .25s, opacity .25s;
}
.nav-burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.is-open span:nth-child(2) { opacity: 0; }
.nav-burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Overlay για κλείσιμο */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.35);
    z-index: 150;
}
.nav-overlay.visible { display: block; }

@media (max-width: 768px) {
    .nav-burger { display: flex; }
    .nav-links {
        display: none;
        position: fixed;
        top: 0; right: 0;
        width: 260px; height: 100vh;
        background: linear-gradient(160deg, #1d4ed8 0%, #6d28d9 100%);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 4rem 1rem 2rem;
        z-index: 200;
        overflow-y: auto;
        box-shadow: -4px 0 20px rgba(0,0,0,.25);
        transition: transform .3s;
        transform: translateX(100%);
    }
    .nav-links.is-open {
        display: flex;
        transform: translateX(0);
    }
    .nav-links > li > a,
    .nav-drop-btn {
        width: 100%;
        padding: .75rem 1rem;
        font-size: .95rem;
        border-radius: 8px;
    }
    .nav-dropdown { position: static; }
    .nav-submenu {
        position: static;
        display: none;
        box-shadow: none;
        background: rgba(255,255,255,.1);
        border: none;
        border-radius: 6px;
        margin: .25rem 0 .25rem 1rem;
        padding: .25rem;
    }
    .nav-dropdown.is-open .nav-submenu { display: block; }
    .nav-submenu li a {
        color: rgba(255,255,255,.9);
        padding: .55rem .85rem;
    }
    .nav-submenu li a:hover { background: rgba(255,255,255,.15); }
    .nav-submenu li a.active {
        background: rgba(255,255,255,.2);
        color: #fff;
    }
    .nav-inner { gap: .5rem; }
    .schedule-grid { grid-template-columns: 70px repeat(7, minmax(80px, 1fr)); font-size: .7rem; }
    .stats { grid-template-columns: repeat(2, 1fr); }
}
/* ── Department color coding ──────────────────────────────────── */
:root {
    --dept-0: #2563eb; --dept-0-bg: #eff6ff; --dept-0-border: #93c5fd;
    --dept-1: #16a34a; --dept-1-bg: #f0fdf4; --dept-1-border: #86efac;
    --dept-2: #d97706; --dept-2-bg: #fffbeb; --dept-2-border: #fcd34d;
    --dept-3: #dc2626; --dept-3-bg: #fff5f5; --dept-3-border: #fca5a5;
    --dept-4: #7c3aed; --dept-4-bg: #f5f3ff; --dept-4-border: #c4b5fd;
    --dept-5: #0891b2; --dept-5-bg: #ecfeff; --dept-5-border: #67e8f9;
    --dept-6: #be185d; --dept-6-bg: #fdf2f8; --dept-6-border: #f9a8d4;
    --dept-7: #065f46; --dept-7-bg: #ecfdf5; --dept-7-border: #6ee7b7;
}
.sg-entry.dept-0 { background:linear-gradient(135deg,var(--dept-0-bg),#dbeafe) !important; border-left-color:var(--dept-0) !important; }
.sg-entry.dept-1 { background:linear-gradient(135deg,var(--dept-1-bg),#dcfce7) !important; border-left-color:var(--dept-1) !important; }
.sg-entry.dept-2 { background:linear-gradient(135deg,var(--dept-2-bg),#fef3c7) !important; border-left-color:var(--dept-2) !important; }
.sg-entry.dept-3 { background:linear-gradient(135deg,var(--dept-3-bg),#fee2e2) !important; border-left-color:var(--dept-3) !important; }
.sg-entry.dept-4 { background:linear-gradient(135deg,var(--dept-4-bg),#ede9fe) !important; border-left-color:var(--dept-4) !important; }
.sg-entry.dept-5 { background:linear-gradient(135deg,var(--dept-5-bg),#cffafe) !important; border-left-color:var(--dept-5) !important; }
.sg-entry.dept-6 { background:linear-gradient(135deg,var(--dept-6-bg),#fce7f3) !important; border-left-color:var(--dept-6) !important; }
.sg-entry.dept-7 { background:linear-gradient(135deg,var(--dept-7-bg),#d1fae5) !important; border-left-color:var(--dept-7) !important; }
.sg-entry.dept-0 strong, .sg-entry.dept-0 .sg-prof { color:var(--dept-0) !important; }
.sg-entry.dept-1 strong, .sg-entry.dept-1 .sg-prof { color:var(--dept-1) !important; }
.sg-entry.dept-2 strong, .sg-entry.dept-2 .sg-prof { color:var(--dept-2) !important; }
.sg-entry.dept-3 strong, .sg-entry.dept-3 .sg-prof { color:var(--dept-3) !important; }
.sg-entry.dept-4 strong, .sg-entry.dept-4 .sg-prof { color:var(--dept-4) !important; }
.sg-entry.dept-5 strong, .sg-entry.dept-5 .sg-prof { color:var(--dept-5) !important; }
.sg-entry.dept-6 strong, .sg-entry.dept-6 .sg-prof { color:var(--dept-6) !important; }
.sg-entry.dept-7 strong, .sg-entry.dept-7 .sg-prof { color:var(--dept-7) !important; }

/* Global search overlay */
#gsOverlay { display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:10000;align-items:flex-start;justify-content:center;padding-top:80px; }
#gsOverlay.open { display:flex; }
#gsBox { background:#fff;border-radius:14px;width:100%;max-width:580px;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden; }
#gsInput { width:100%;padding:1rem 1.25rem;font-size:1.05rem;border:none;outline:none;border-bottom:1px solid #e2e8f0; }
#gsResults { max-height:420px;overflow-y:auto; }
.gs-group { padding:.4rem .75rem .2rem;font-size:.7rem;font-weight:700;color:#94a3b8;text-transform:uppercase;letter-spacing:.05em; }
.gs-item { display:flex;align-items:center;gap:.65rem;padding:.55rem .75rem;cursor:pointer;text-decoration:none;color:#1e293b; }
.gs-item:hover { background:#f1f5f9; }
.gs-item-icon { font-size:1rem;width:20px;text-align:center;flex-shrink:0; }
.gs-item-main { font-size:.85rem;font-weight:500; }
.gs-item-sub  { font-size:.75rem;color:#94a3b8; }
.gs-empty { padding:1.5rem;text-align:center;color:#94a3b8;font-size:.88rem; }