/* ==========================================================================
   CCPL RAG — Design system
   ========================================================================== */

:root {
    --bg: #f4f2ec;
    --bg-soft: #ebe9e0;
    --ink: #1a2420;
    --ink-soft: #34433c;
    --muted: #66756c;
    --muted-soft: #8b978f;
    --brand: #0b6b57;
    --brand-deep: #063f34;
    --brand-bright: #128a6f;
    --brand-soft: #e3efe8;
    --accent: #bd6a34;
    --accent-deep: #96501f;
    --accent-soft: #f5e6d8;
    --surface: #ffffff;
    --surface-alt: #fbfaf7;
    --line: rgba(26, 36, 32, 0.11);
    --line-soft: rgba(26, 36, 32, 0.06);
    --danger: #ae3b34;
    --danger-deep: #862c27;
    --danger-soft: #f7e3e1;
    --success: #1f7a4d;
    --success-soft: #e2f1e7;
    --warning: #a15c00;
    --warning-soft: #f7ecd9;
    --shadow-sm: 0 2px 10px rgba(20, 30, 26, 0.06);
    --shadow: 0 18px 44px rgba(20, 30, 26, 0.10);
    --shadow-lg: 0 34px 84px rgba(20, 30, 26, 0.18);
    --radius-sm: 10px;
    --radius: 16px;
    --radius-lg: 24px;
    --font: "DM Sans", sans-serif;
    --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    background:
        radial-gradient(1100px 560px at 10% -10%, #ffffff 0%, transparent 55%),
        radial-gradient(900px 520px at 105% -6%, color-mix(in srgb, var(--brand) 10%, transparent) 0%, transparent 50%),
        radial-gradient(700px 480px at 50% 115%, color-mix(in srgb, var(--accent) 7%, transparent) 0%, transparent 55%),
        linear-gradient(165deg, var(--bg), var(--bg-soft));
}

::selection { background: color-mix(in srgb, var(--brand) 25%, transparent); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--ink) 16%, transparent);
    border-radius: 999px;
    border: 2px solid transparent;
}
::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--ink) 26%, transparent); }

.shell {
    max-width: 1120px;
    margin: 0 auto;
    padding: 2.25rem 1.5rem 4rem;
}

/* ——— Top bar ——— */

.topbar {
    position: relative;
    background: color-mix(in srgb, #fff 94%, var(--bg));
    border-bottom: 1px solid var(--line);
}

.topbar::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 3px;
    background: linear-gradient(90deg, var(--brand) 0%, var(--brand-bright) 45%, var(--accent) 100%);
    opacity: 0.85;
}

.topbar-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0.95rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.brand {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    border-radius: 12px;
    transition: opacity 140ms ease;
}

.brand:hover { opacity: 0.82; }

.brand-logo {
    display: block;
    height: 50px;
    width: auto;
    border-radius: 10px;
}

.brand-text {
    display: grid;
    gap: 0.05rem;
}

.brand-mark {
    font-family: var(--display);
    font-size: 1.28rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--brand-deep);
    line-height: 1.15;
}

.brand-sub {
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 500;
}

.topbar-actions {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

/* ——— Generic layout / typography ——— */

.main { min-height: 60vh; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.74rem;
    color: var(--brand);
    margin: 0 0 0.6rem;
    font-weight: 700;
}

.eyebrow::before {
    content: "";
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: var(--accent);
}

h1 {
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(1.9rem, 3.4vw, 2.6rem);
    margin: 0 0 0.5rem;
    line-height: 1.12;
    color: var(--ink);
    letter-spacing: -0.01em;
}

.lede {
    color: var(--muted);
    margin: 0;
    max-width: 42rem;
    font-size: 1.02rem;
    line-height: 1.5;
}

.section-head { margin-bottom: 2rem; }

.empty {
    color: var(--muted);
    padding: 2rem 0;
}

/* ——— Home / topic grid ——— */

.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.1rem;
}

.topic-card {
    position: relative;
    display: grid;
    gap: 0.5rem;
    padding: 1.5rem 1.5rem 1.4rem;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: transform 200ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 200ms ease, border-color 200ms ease;
}

.topic-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(140deg, color-mix(in srgb, var(--brand) 5%, transparent), transparent 55%);
    opacity: 0;
    transition: opacity 200ms ease;
}

.topic-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--brand) 35%, var(--line));
    box-shadow: var(--shadow);
}

.topic-card:hover::before { opacity: 1; }

.topic-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.6rem;
    height: 2.6rem;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--brand), var(--brand-bright));
    color: #fff;
    font-family: var(--display);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 0.35rem;
    box-shadow: 0 6px 16px color-mix(in srgb, var(--brand) 35%, transparent);
}

.topic-slug {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    color: var(--brand);
    text-transform: uppercase;
}

.topic-card h2 {
    font-family: var(--display);
    font-size: 1.32rem;
    margin: 0;
    line-height: 1.2;
}

.topic-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.93rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.topic-cta {
    position: relative;
    margin-top: 0.65rem;
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--brand-deep);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.topic-cta::after {
    content: "→";
    display: inline-block;
    transition: transform 200ms ease;
}

.topic-card:hover .topic-cta::after {
    transform: translateX(3px);
}

/* ——— Login ——— */

.login-panel {
    min-height: 72vh;
    display: grid;
    place-items: center;
}

.login-card {
    position: relative;
    width: min(100%, 440px);
    padding: 2.35rem 2.15rem 2.15rem;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    text-align: center;
    overflow: hidden;
}

.login-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand), var(--brand-bright), var(--accent));
}

.login-logo {
    display: block;
    width: min(100%, 240px);
    height: auto;
    margin: 0 auto 1.5rem;
}

.login-card .eyebrow { justify-content: center; }
.login-card h1 { text-align: center; }
.login-card .lede { max-width: none; text-align: center; margin: 0 auto 0.5rem; }

.stack { display: grid; gap: 1.05rem; margin-top: 1.75rem; text-align: left; }

label {
    display: grid;
    gap: 0.4rem;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--ink-soft);
}

input, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.75rem 0.95rem;
    font: inherit;
    background: var(--surface-alt);
    color: var(--ink);
    transition: border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--brand) 45%, var(--line));
    background: #fff;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 14%, transparent);
}

textarea { resize: vertical; }

.login-card .btn-primary {
    width: 100%;
    margin-top: 0.3rem;
    padding: 0.85rem 1.15rem;
}

/* ——— Buttons ——— */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    border-radius: 999px;
    padding: 0.72rem 1.2rem;
    font: inherit;
    font-weight: 600;
    font-size: 0.94rem;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease, color 150ms ease, transform 150ms ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
    background: linear-gradient(135deg, var(--brand), var(--brand-bright));
    color: #fff;
    box-shadow: 0 8px 20px color-mix(in srgb, var(--brand) 32%, transparent);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--brand-deep), var(--brand));
    box-shadow: 0 10px 24px color-mix(in srgb, var(--brand) 40%, transparent);
}

.btn-ghost {
    background: var(--surface);
    border-color: var(--line);
    color: var(--ink-soft);
}

.btn-ghost:hover {
    border-color: color-mix(in srgb, var(--brand) 35%, var(--line));
    background: color-mix(in srgb, var(--brand) 5%, #fff);
    color: var(--brand-deep);
}

.btn-sm {
    padding: 0.48rem 0.95rem;
    font-size: 0.86rem;
}

.btn-danger-ghost {
    background: var(--surface);
    border-color: color-mix(in srgb, var(--danger) 30%, var(--line));
    color: var(--danger);
}

.btn-danger-ghost:hover {
    background: var(--danger-soft);
    border-color: var(--danger);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover { background: var(--danger-deep); }

.linkish {
    appearance: none;
    border: 0;
    background: none;
    padding: 0;
    color: var(--brand-deep);
    font: inherit;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
    cursor: pointer;
}

/* ——— Alerts / flashes ——— */

.alert {
    background: var(--danger-soft);
    color: var(--danger-deep);
    border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent);
    border-radius: 12px;
    padding: 0.8rem 1rem;
    font-size: 0.9rem;
    text-align: left;
}

.flash {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    margin: 0 0 0.85rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.4;
    animation: msgIn 220ms ease both;
}

.flash::before {
    content: "";
    flex-shrink: 0;
    margin-top: 0.35rem;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
}

.flash-success {
    background: var(--success-soft);
    color: #145c39;
    border: 1px solid color-mix(in srgb, var(--success) 25%, transparent);
}
.flash-success::before { background: var(--success); }

.flash-error {
    background: var(--danger-soft);
    color: var(--danger-deep);
    border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent);
}
.flash-error::before { background: var(--danger); }

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}