:root {
    --ink: #2b2f38;
    --ink-soft: #6d7380;
    --paper: #f4f6fb;
    --card: #ffffff;
    --line: #e6e8f0;
    --cyan: #00bcd4;
    --cyan-dark: #0097a7;
    --primary: #5b4ec6;
    --primary-soft: #7d71e4;
    --danger: #d15b47;
    --sidebar: #f3f4f6;
    --sidebar-text: #3a3f4b;
    --shadow: 0 10px 28px rgba(67, 97, 238, 0.08);
    --radius: 12px;
    font-family: "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
}
a { color: var(--primary); text-decoration: none; }
button, input, select, textarea { font: inherit; }
h1, h2, h3 { font-weight: 650; letter-spacing: -0.02em; }

.auth-shell, .error-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(320px, 480px) 1fr;
}
.auth-panel, .error-panel {
    background: var(--card);
    padding: 48px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--cyan), var(--primary));
    color: #fff;
    font-weight: 700;
    font-size: 18px;
}
.auth-story {
    background:
        radial-gradient(circle at 88% 8%, rgba(133, 121, 235, 0.45), transparent 26%),
        radial-gradient(circle at 8% 92%, rgba(0, 188, 212, 0.28), transparent 24%),
        #eef1fb;
    color: var(--ink);
    padding: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.auth-story .small { color: var(--primary); font-weight: 700; letter-spacing: .08em; }
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.story-card {
    background: #fff;
    border: 0;
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 16px;
}
.muted { color: var(--ink-soft); }
.small { font-size: 13px; }

.app { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar {
    background: var(--sidebar);
    color: var(--sidebar-text);
    padding: 18px 12px;
    border-right: 1px solid var(--line);
}
.sidebar a {
    color: var(--sidebar-text);
    display: block;
    padding: 8px 12px;
    border-radius: 8px;
}
.sidebar a.active, .sidebar a:hover { background: #e7f8fb; color: var(--cyan-dark); }
.side-label {
    margin: 18px 12px 6px;
    font-size: 11px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: #8b909a;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 48px;
    padding: 8px 22px;
    background: var(--cyan);
    color: #fff;
    position: sticky;
    top: 0;
}
.topbar strong, .topbar .muted, .topbar span { color: #fff; }
.topbar button.secondary {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}
.content { padding: 22px; }
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}
.grid-4, .grid-3, .grid-2 { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: 1.2fr .8fr; }
.stat strong { display: block; font-size: 28px; margin-top: 6px; color: var(--primary); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-soft); }
label { display: block; font-size: 13px; margin-bottom: 6px; color: #5c6370; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], select, textarea {
    width: 100%;
    padding: 11px 12px;
    border-radius: 10px;
    border: 1px solid #ececf5;
    background: #f6f6fb;
    margin-bottom: 12px;
    color: var(--ink);
}
.btn, button {
    border: 0;
    border-radius: 12px;
    padding: 11px 16px;
    background: linear-gradient(180deg, var(--primary-soft), var(--primary));
    color: white;
    cursor: pointer;
}
.btn.secondary, button.secondary { background: #eef0f7; color: var(--ink); }
.btn.danger, button.danger { background: var(--danger); }
.btn.ghost { background: transparent; color: var(--primary); border: 1px solid #d9dced; }
.auth-panel button[type=submit], .error-panel button[type=submit] { width: 100%; }
.row-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.check-list { margin: 0 0 16px; padding-left: 18px; }
.check-list li { margin: 4px 0; }
.flash { padding: 12px 14px; border-radius: 12px; margin-bottom: 16px; }
.flash.ok { background: #e5f8f6; color: #0f6f64; }
.flash.error { background: #fde8e4; color: #8a2e22; }
.badge { display: inline-block; padding: 3px 8px; border-radius: 999px; background: #eef0f7; font-size: 12px; }
.badge.ok { background: #e5f8f6; color: #0f6f64; }
.badge.warn { background: #fff4df; color: #9a6408; }
.pay-grid { display: grid; grid-template-columns: 1fr 140px 1fr; gap: 8px; }
.menu-toggle { display: none; }
.section-label {
    margin: 22px 0 10px;
    font-size: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--primary);
}
.tile-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 12px; }
.tile {
    background: #fff;
    border: 1px solid #eef0f7;
    border-radius: 14px;
    box-shadow: var(--shadow);
    min-height: 104px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--ink);
    font-weight: 650;
}
.tile .swatch {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    color: #fff;
    font-size: 13px;
}
.t-teal .swatch { background: #2ec4b6; }
.t-orange .swatch { background: #f59f00; }
.t-violet .swatch { background: #7b2d8b; }
.t-pink .swatch { background: #e91e8c; }
.t-blue .swatch { background: #4361ee; }
.t-amber .swatch { background: #e67e22; }
.t-indigo .swatch { background: #5b4ec6; }
.t-slate .swatch { background: #607087; }
@media (max-width: 980px) {
    .auth-shell, .error-shell, .app, .grid-4, .grid-3, .grid-2, .pay-grid { grid-template-columns: 1fr; }
    .auth-story { display: none; }
    .sidebar { display: none; }
    .sidebar.open { display: block; }
    .menu-toggle { display: inline-flex; }
    .content { padding: 16px; }
}