/* ===== FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=DM+Mono:wght@400;500&display=swap');

/* ===== VARIABLES ===== */
:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface2: #22263a;
    --border: #2e3250;
    --accent: #6c63ff;
    --accent2: #ff6584;
    --accent3: #43e97b;
    --text: #e8eaf6;
    --text-muted: #7b7f9e;
    --danger: #ff4757;
    --warning: #ffa502;
    --success: #2ed573;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --sidebar-width: 250px;
    --topbar-height: 64px;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

/* ===== LAYOUT ===== */
.app-wrapper { display: flex; min-height: 100vh; }

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 200;
    padding: 0;
    transition: transform 0.3s ease, width 0.3s ease;
}

.sidebar-brand {
    padding: 24px 20px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.sidebar-brand span.logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.nav-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
    padding: 12px 10px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    cursor: pointer;
    white-space: nowrap;
}

.nav-item:hover, .nav-item.active {
    background: var(--surface2);
    color: var(--text);
    text-decoration: none;
}

.nav-item.active { color: var(--accent); }

.nav-item .icon { font-size: 1.1rem; width: 22px; text-align: center; flex-shrink: 0; }

.sidebar-bottom {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--surface2);
    margin-bottom: 8px;
}

.user-avatar {
    width: 34px; height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: white;
    flex-shrink: 0;
}

.user-name { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.user-role {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: 'DM Mono', monospace;
}

/* ===== MOBILE MENU TOGGLE ===== */
.menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text);
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 150;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.active { display: block; }

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
}

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-title { font-size: 1.3rem; font-weight: 700; }
.page-subtitle { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

.content-area { padding: 32px; flex: 1; }

/* ===== CARDS ===== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 12px;
    flex-wrap: wrap;
}

.card-title { font-size: 1rem; font-weight: 600; }

/* ===== STATS GRID ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}

.stat-card.blue::before { background: var(--accent); }
.stat-card.pink::before { background: var(--accent2); }
.stat-card.green::before { background: var(--accent3); }
.stat-card.yellow::before { background: var(--warning); }

.stat-number { font-size: 2.5rem; font-weight: 700; font-family: 'DM Mono', monospace; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-icon { font-size: 2rem; opacity: 0.15; position: absolute; right: 16px; top: 16px; }

/* ===== TABLE ===== */
.table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 480px;
}

thead th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface2); }

/* ===== BADGES ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: 'DM Mono', monospace;
    white-space: nowrap;
}

.badge-todo { background: rgba(123,127,158,0.2); color: var(--text-muted); }
.badge-progress { background: rgba(108,99,255,0.2); color: var(--accent); }
.badge-done { background: rgba(46,213,115,0.2); color: var(--success); }

.badge-low { background: rgba(46,213,115,0.15); color: var(--success); }
.badge-medium { background: rgba(255,165,2,0.15); color: var(--warning); }
.badge-high { background: rgba(255,71,87,0.15); color: var(--danger); }

.badge-admin { background: rgba(255,101,132,0.2); color: var(--accent2); }
.badge-member { background: rgba(108,99,255,0.2); color: var(--accent); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: white;
}
.btn-primary:hover { background: #574fd6; color: white; text-decoration: none; }

.btn-danger {
    background: rgba(255,71,87,0.15);
    color: var(--danger);
    border: 1px solid rgba(255,71,87,0.3);
}
.btn-danger:hover { background: var(--danger); color: white; text-decoration: none; }

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--surface2); text-decoration: none; }

.btn-success {
    background: rgba(46,213,115,0.15);
    color: var(--success);
    border: 1px solid rgba(46,213,115,0.3);
}
.btn-success:hover { background: var(--success); color: var(--bg); text-decoration: none; }

.btn-sm { padding: 5px 10px; font-size: 0.78rem; }

/* ===== FORMS ===== */
.form-card { max-width: 640px; }

.form-group { margin-bottom: 20px; }

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    transition: border-color 0.2s;
    outline: none;
}

.form-control:focus { border-color: var(--accent); }

select.form-control option { background: var(--surface2); }

textarea.form-control { resize: vertical; min-height: 90px; }

.form-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* ===== ALERTS ===== */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.88rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-success { background: rgba(46,213,115,0.1); border: 1px solid rgba(46,213,115,0.3); color: var(--success); }
.alert-error { background: rgba(255,71,87,0.1); border: 1px solid rgba(255,71,87,0.3); color: var(--danger); }
.alert-info { background: rgba(108,99,255,0.1); border: 1px solid rgba(108,99,255,0.3); color: var(--accent); }

/* ===== AUTH PAGES ===== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    position: relative;
    overflow: hidden;
    padding: 24px 16px;
}

.auth-wrapper::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(108,99,255,0.15) 0%, transparent 70%);
    top: -200px; left: -100px;
    pointer-events: none;
}

.auth-wrapper::after {
    content: '';
    position: absolute;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(255,101,132,0.1) 0%, transparent 70%);
    bottom: -150px; right: -100px;
    pointer-events: none;
}

.auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow);
}

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo .logo-mark {
    width: 56px; height: 56px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.auth-logo h1 { font-size: 1.5rem; font-weight: 700; }
.auth-logo p { color: var(--text-muted); font-size: 0.85rem; margin-top: 4px; }

/* ===== DASHBOARD ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

/* ===== PROJECT DETAIL ===== */
.detail-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.detail-title { font-size: 1.5rem; font-weight: 700; }
.detail-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; align-items: center; }
.detail-meta span { font-size: 0.82rem; color: var(--text-muted); }

.members-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.member-chip {
    display: flex; align-items: center; gap: 6px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.8rem;
}
.member-chip .mini-avatar {
    width: 20px; height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex; align-items: center; justify-content: center;
    font-size: 0.6rem;
    font-weight: 700;
    color: white;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: 0.9rem; }

/* ===== LOGOUT BTN ===== */
.logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    border: none;
    cursor: pointer;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}
.logout-btn:hover { background: rgba(255,71,87,0.1); color: var(--danger); }

/* ===== STATUS SELECT ===== */
.status-form { display: inline; }
.status-select {
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 6px;
    padding: 4px 8px;
    font-size: 0.78rem;
    font-family: 'DM Mono', monospace;
    cursor: pointer;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }


/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   - Desktop  : > 1024px  (default, no override needed)
   - Tablet   : 641px – 1024px
   - Mobile L : 481px – 640px
   - Mobile S : ≤ 480px
   ========================================================================== */

/* ===== TABLET (≤ 1024px) ===== */
@media (max-width: 1024px) {

    :root { --sidebar-width: 220px; }

    .content-area { padding: 24px; }

    .topbar { padding: 14px 24px; }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-number { font-size: 2rem; }

    .form-card { max-width: 100%; }
}

/* ===== TABLET PORTRAIT / LARGE MOBILE (≤ 768px) ===== */
@media (max-width: 768px) {

    /* Sidebar slides off-screen; toggled via JS by adding .open */
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
        box-shadow: none;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 32px rgba(0,0,0,0.6);
    }

    /* Hamburger button visible */
    .menu-toggle { display: flex; }

    /* Content takes full width */
    .main-content { margin-left: 0; }

    .topbar { padding: 12px 16px; }

    .page-title { font-size: 1.1rem; }

    .content-area { padding: 16px; }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-bottom: 20px;
    }

    .stat-number { font-size: 1.8rem; }
    .stat-label { font-size: 0.72rem; }

    .card { padding: 16px; }

    .card-header { margin-bottom: 14px; }

    /* Stack detail header on small screens */
    .detail-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .detail-title { font-size: 1.2rem; }

    /* Auth */
    .auth-card { padding: 28px 20px; }

    /* Dashboard */
    .dashboard-grid { gap: 16px; }
}

/* ===== MOBILE LANDSCAPE / SMALL TABLET (≤ 640px) ===== */
@media (max-width: 640px) {

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .stat-card { padding: 14px; }

    .stat-number { font-size: 1.6rem; }

    table { font-size: 0.82rem; }

    thead th, tbody td { padding: 10px 12px; }

    .btn { padding: 7px 13px; font-size: 0.82rem; }

    .form-actions { flex-direction: column; align-items: stretch; }
    .form-actions .btn { justify-content: center; }
}

/* ===== MOBILE PORTRAIT (≤ 480px) ===== */
@media (max-width: 480px) {

    :root { --radius: 10px; }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .stat-card { padding: 12px 14px; }

    .stat-number { font-size: 1.4rem; }

    .stat-icon { font-size: 1.5rem; }

    .card { padding: 14px; }

    .auth-card {
        padding: 24px 16px;
        border-radius: 12px;
    }

    .auth-logo h1 { font-size: 1.25rem; }

    .auth-logo .logo-mark { width: 48px; height: 48px; font-size: 1.3rem; }

    .page-title { font-size: 1rem; }

    .page-subtitle { display: none; }

    .nav-label { padding: 8px 10px 4px; }

    /* Condensed user info in sidebar */
    .user-name { font-size: 0.8rem; }
    .user-role { font-size: 0.65rem; }

    .member-chip { font-size: 0.75rem; padding: 3px 10px; }

    .badge { font-size: 0.7rem; padding: 2px 8px; }

    .empty-state { padding: 40px 16px; }
    .empty-state .empty-icon { font-size: 2.4rem; }
}

/* ===== VERY SMALL DEVICES (≤ 360px) ===== */
@media (max-width: 360px) {

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

    .stat-number { font-size: 1.8rem; }

    .topbar { flex-wrap: wrap; gap: 8px; }

    .content-area { padding: 12px; }
}

/* ===== TOUCH DEVICE UTILITIES ===== */
@media (hover: none) and (pointer: coarse) {
    /* Larger tap targets on touch screens */
    .nav-item { padding: 13px 12px; }
    .btn { padding: 10px 16px; min-height: 44px; }
    .btn-sm { min-height: 36px; }
    .form-control { padding: 12px 14px; font-size: 1rem; }
    .status-select { padding: 6px 10px; font-size: 0.85rem; }
    .logout-btn { padding: 13px 12px; }
}

/* ===== SIDEBAR JS HELPER (add to your JS) =====

   Minimal JS needed to wire up the mobile toggle:

   const toggle = document.querySelector('.menu-toggle');
   const sidebar = document.querySelector('.sidebar');
   const overlay = document.querySelector('.sidebar-overlay');

   toggle?.addEventListener('click', () => {
       sidebar.classList.toggle('open');
       overlay.classList.toggle('active');
   });

   overlay?.addEventListener('click', () => {
       sidebar.classList.remove('open');
       overlay.classList.remove('active');
   });

   ============================================== */