* { box-sizing: border-box; }

:root {
    --accent: #22d3ee;
    --accent-rgb: 34, 211, 238;
    --accent-bright: #67e8f9;
    --accent-soft: #cffafe;
    --bg-deep: #000000;
    --bg: #050b13;
    --panel: rgba(11, 17, 22, 0.94);
    --panel-strong: rgba(8, 12, 16, 0.98);
    --panel-border: rgba(34, 211, 238, 0.25);
    --panel-border-strong: rgba(34, 211, 238, 0.44);
    --text: #f4fbfd;
    --muted: rgba(244, 251, 253, 0.78);
    --danger: #ff6b6b;
    --danger-soft: rgba(255, 107, 107, 0.18);
    --success-soft: rgba(34, 197, 94, 0.15);
    --shadow: 0 18px 42px rgba(0, 0, 0, 0.6);
    --radius: 18px;
}

html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top right, rgba(var(--accent-rgb), 0.18), transparent 28%),
        radial-gradient(circle at left center, rgba(var(--accent-rgb), 0.10), transparent 26%),
        linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
}

h1,h2,h3,p { margin-top: 0; }
a { color: inherit; }
label { display: flex; flex-direction: column; gap: 0.45rem; color: var(--muted); font-size: 0.95rem; }
input, textarea {
    width: 100%;
    border-radius: 12px;
    border: 1px solid rgba(var(--accent-rgb), 0.24);
    background: rgba(0,0,0,0.34);
    color: var(--text);
    padding: 0.9rem 1rem;
    font: inherit;
    outline: none;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}
input:focus, textarea:focus {
    border-color: rgba(var(--accent-rgb), 0.72);
    box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.16), 0 0 14px rgba(var(--accent-rgb), 0.14);
}
textarea { resize: vertical; min-height: 300px; line-height: 1.6; }
button, .btn {
    appearance: none;
    border: none;
    border-radius: 12px;
    padding: 0.78rem 1rem;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease, box-shadow 0.15s ease;
}
button:hover, .btn:hover { transform: translateY(-1px); }
.btn-compact { padding: 0.58rem 0.8rem; font-size: 0.92rem; border-radius: 11px; }
.icon-only { min-width: 2.6rem; width: 2.6rem; padding-inline: 0; }
.btn-primary {
    background: linear-gradient(180deg, rgba(16, 52, 60, 0.98), rgba(8, 28, 34, 0.98));
    color: #f4feff;
    border: 1px solid #6ffaff;
    box-shadow: 0 0 24px rgba(57, 231, 240, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.btn-secondary {
    color: var(--text);
    border: 1px solid rgba(var(--accent-rgb), 0.22);
    background: linear-gradient(180deg, rgba(18, 26, 30, 0.98), rgba(9, 14, 17, 0.99));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 0 12px rgba(var(--accent-rgb), 0.08);
}
.btn-danger {
    color: #ffd3d3;
    border: 1px solid rgba(255, 107, 107, 0.28);
    background: linear-gradient(180deg, rgba(72, 24, 28, 0.98), rgba(44, 14, 18, 0.98));
}
.small { font-size: 0.86rem; }
.muted { color: var(--muted); }
.eyebrow {
    margin-bottom: 0.45rem;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: rgba(var(--accent-rgb), 0.8);
}
.workflow-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.85rem;
    border-radius: 999px;
    border: 1px solid rgba(var(--accent-rgb), 0.58);
    background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.24), rgba(var(--accent-rgb), 0.11));
    color: #f4feff;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.alert, .sidebar-box, .panel, .login-card { background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius); box-shadow: var(--shadow); }
.alert { padding: 1rem 1.1rem; margin-bottom: 1rem; }
.alert-success { border-color: rgba(34, 197, 94, 0.35); background: linear-gradient(180deg, rgba(20, 44, 28, 0.95), rgba(9, 20, 13, 0.98)); }
.alert-error { border-color: rgba(255, 107, 107, 0.38); background: linear-gradient(180deg, rgba(60, 16, 20, 0.95), rgba(26, 10, 12, 0.98)); }

.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; }
.login-card { width: min(100%, 460px); padding: 2rem; }
.helper-card { margin-top: 1rem; padding: 1rem; background: rgba(0,0,0,0.18); border: 1px solid rgba(var(--accent-rgb),0.12); border-radius: 14px; }
.helper-card code { background: rgba(var(--accent-rgb), 0.08); padding: 0.12rem 0.4rem; border-radius: 6px; }

.app-shell { display: grid; grid-template-columns: 320px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
    position: sticky; top: 0; height: 100vh; padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem;
    background: linear-gradient(180deg, rgba(5,10,14,0.95), rgba(4,8,12,0.97));
    border-right: 1px solid rgba(var(--accent-rgb), 0.16);
    box-shadow: inset -1px 0 0 rgba(var(--accent-rgb), 0.05), 0 0 26px rgba(var(--accent-rgb), 0.05);
}
.sidebar-brand { padding-right: 0.2rem; }
.sidebar-title { margin: 0; font-size: 2.2rem; line-height: 1.02; }
.sidebar-subtitle { margin: 0.15rem 0 0; color: var(--muted); }
.sidebar-toggle { display: none; }
.sidebar-nav { display: grid; gap: 0.65rem; }
.sidebar-nav a {
    color: var(--text); text-decoration: none; padding: 1rem 1.05rem; border-radius: 16px;
    border: 1px solid transparent; background: linear-gradient(180deg, rgba(14,18,22,0.96), rgba(10,13,16,0.98));
}
.sidebar-nav a:hover { border-color: rgba(var(--accent-rgb), 0.28); }
.sidebar-box { padding: 1rem 1.05rem; }
.sidebar-status { margin-top: auto; }
.sidebar-status p { margin: 0.55rem 0 0; line-height: 1.45; }
.content { padding: 1.2rem 1.2rem 1.8rem; }
.topbar {
    position: sticky; top: 0.75rem; z-index: 40; display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem;
    margin-bottom: 1rem; padding: 1rem 1.1rem; background: rgba(5,10,14,0.9); backdrop-filter: blur(14px);
    border: 1px solid rgba(var(--accent-rgb), 0.18); border-radius: 18px; box-shadow: var(--shadow);
}
.topbar-copy h2 { margin-bottom: 0.35rem; font-size: clamp(1.8rem, 3vw, 2.6rem); }
.topbar-copy p { margin-bottom: 0; color: var(--muted); line-height: 1.55; max-width: 720px; }
.topbar-actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0.6rem; }
.file-label { cursor: pointer; }
.save-state {
    display: inline-flex; align-items: center; min-height: 2.35rem; padding: 0.45rem 0.8rem; border-radius: 999px;
    border: 1px solid rgba(var(--accent-rgb), 0.24); color: var(--muted); background: rgba(0,0,0,0.22);
}
.save-state[data-state="dirty"] { border-color: rgba(255, 184, 107, 0.38); color: #ffcf9a; }
.save-state[data-state="saving"] { border-color: rgba(var(--accent-rgb), 0.46); color: #dffcff; }
.save-state[data-state="error"] { border-color: rgba(255,107,107,0.45); color: #ffd3d3; }
.panel {
    padding: 1.15rem; background: linear-gradient(180deg, rgba(11,17,22,0.96), rgba(8,13,18,0.98));
    box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), 0.05), 0 0 22px rgba(var(--accent-rgb), 0.04);
}
.panel + .panel { margin-top: 1rem; }
.compact-panel-head { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; margin-bottom: 1rem; }
.compact-panel-head h3 { margin: 0 0 0.3rem; font-size: 1.45rem; }
.compact-panel-head p { margin: 0; color: var(--muted); line-height: 1.5; }
.notes-meta { padding-top: 0.4rem; }
.links-stack { display: flex; flex-direction: column; gap: 0.7rem; overflow: hidden; }
.links-stack.collapsed, .panel.collapsed .links-stack, .panel.collapsed .compact-panel-head + .links-stack { display: none; }
#linksPanel.collapsed { padding-bottom: 0.9rem; }
.link-card {
    padding: 0.8rem 0.9rem; border-radius: 16px; border: 1px solid rgba(var(--accent-rgb), 0.14);
    background: linear-gradient(180deg, rgba(7,12,18,0.96), rgba(7,11,16,0.99));
    box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb),0.04), 0 0 14px rgba(var(--accent-rgb),0.04);
}
.link-card.pulse-in { animation: pulseIn 280ms ease; }
@keyframes pulseIn { from { transform: scale(0.985); } to { transform: scale(1); } }
.link-row-top { display: flex; align-items: flex-end; gap: 0.9rem; }
.inline-grow { flex: 1 1 auto; }
.compact-field { display: flex; flex-direction: column; gap: 0.32rem; }
.compact-field span { font-size: 0.82rem; }
.compact-field-label span { margin-left: 0.1rem; }
.link-actions { display: inline-flex; align-items: center; justify-content: flex-end; gap: 0.42rem; flex-shrink: 0; margin-top: 0; }
.toggle-details-btn { font-size: 0.96rem; }
.link-details { margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid rgba(var(--accent-rgb),0.1); }
.link-card.is-collapsed .link-details { display: none; }
.notes-area { min-height: 420px; }
.hidden-file-wrap { display: none; }
.toast {
    position: fixed; right: 1rem; bottom: 1rem; display: flex; align-items: center; gap: 0.75rem;
    padding: 0.85rem 0.9rem; background: rgba(8,12,18,0.98); border: 1px solid rgba(var(--accent-rgb),0.26);
    border-radius: 16px; box-shadow: var(--shadow); transform: translateY(16px); opacity: 0; transition: opacity 0.18s ease, transform 0.18s ease;
}
.toast.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 920px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar {
        position: static; height: auto; padding: 1rem; gap: 0.8rem; border-right: none; border-bottom: 1px solid rgba(var(--accent-rgb), 0.16);
    }
    .sidebar {
        display: grid; grid-template-columns: 1fr auto; align-items: start;
    }
    .sidebar-brand { min-width: 0; }
    .sidebar-toggle { display: inline-flex; align-self: start; margin-left: auto; }
    .sidebar-nav {
        grid-column: 1 / -1; display: none; grid-template-columns: 1fr; gap: 0.55rem;
    }
    .sidebar-nav.open { display: grid; }
    .sidebar-status {
        grid-column: 1 / -1; margin-top: 0; padding: 0.9rem 0.95rem;
    }
    .content { padding: 0.9rem; }
    .topbar { top: 0.5rem; flex-direction: column; padding: 0.95rem; }
    .topbar-actions { width: 100%; justify-content: flex-start; }
}

@media (max-width: 680px) {
    .sidebar { padding: 0.8rem; }
    .sidebar-title { font-size: 1.95rem; }
    .sidebar-nav a, .sidebar-box, .topbar, .panel { width: 100%; }
    .sidebar-nav a { padding: 0.95rem 1rem; }
    .topbar-copy p { font-size: 0.96rem; }
    .topbar-actions { gap: 0.5rem; }
    .topbar-actions .btn, .topbar-actions .save-state, .file-label { min-height: 2.65rem; }
    .compact-panel-head { flex-direction: column; }
    .link-row-top { flex-direction: column; gap: 0.5rem; }
    .link-actions { width: 100%; justify-content: flex-end; margin-top: 0; }
    .notes-area { min-height: 300px; }
    .toast { left: 0.8rem; right: 0.8rem; bottom: 0.8rem; }
}