/* =========================================
   Salsa Collaborate Page Styles
   ========================================= */

/* ─── Hero ─── */
.collab-hero {
    padding: 180px 40px 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.collab-hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(96,165,250,0.15) 0%, transparent 70%);
    filter: blur(100px);
    z-index: 0;
    pointer-events: none;
}

html.light .collab-hero::before {
    background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%);
}

.collab-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 780px;
    margin: 0 auto;
}

.collab-hero h1 {
    font-size: clamp(2.5rem, 6vw, 3.75rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

/* ─── Active nav link ─── */
.nav-active {
    color: var(--text-1) !important;
}

/* ─── Section blocks ─── */
.collab-block {
    padding: 120px 40px;
}

.collab-block.alt {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.collab-block .section-sub {
    margin-bottom: 48px;
}

/* ─── Split layout (reused from security) ─── */
.sec-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.sec-split.reverse {
    direction: rtl;
}
.sec-split.reverse > * {
    direction: ltr;
}

.sec-text p {
    font-size: 1rem;
    color: var(--text-2);
    line-height: 1.75;
    margin-top: 16px;
}

.sec-text p strong {
    color: var(--text-1);
}

.sec-text p code {
    font-family: var(--mono);
    font-size: 0.8125rem;
    padding: 2px 6px;
    background: rgba(255,255,255,0.06);
    border-radius: 3px;
    color: var(--text-1);
}

html.light .sec-text p code {
    background: rgba(0,0,0,0.05);
}

/* ─── Philosophy grid ─── */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.phil-card {
    padding: 32px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: left;
    transition: all 0.2s;
}

.phil-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-elevated);
}

.phil-card.accent {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.phil-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.phil-icon svg {
    width: 22px;
    height: 22px;
}

.phil-icon.people {
    background: rgba(96,165,250,0.12);
    color: var(--blue);
}

.phil-icon.agent {
    background: rgba(167,139,250,0.12);
    color: var(--purple);
}

.phil-icon.loop {
    background: rgba(232,70,30,0.12);
    color: var(--accent);
}

.phil-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.phil-card p {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.65;
}

/* ─── Invite flow ─── */
.invite-flow {
    max-width: 640px;
    margin: 48px auto 0;
}

.flow-step {
    display: flex;
    gap: 24px;
    padding: 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}

.flow-step:hover {
    border-color: var(--border-hover);
}

.flow-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    color: var(--text-2);
    font-size: 0.875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

html.light .flow-num {
    background: rgba(0,0,0,0.05);
}

.flow-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-1);
}

.flow-content p {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 12px;
}

.flow-detail {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.flow-detail code {
    font-family: var(--mono);
    font-size: 0.75rem;
    padding: 4px 8px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-2);
}

html.light .flow-detail code {
    background: rgba(0,0,0,0.03);
}

.flow-secure {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.flow-actor {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 3px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.flow-actor.owner {
    background: rgba(167,139,250,0.12);
    color: var(--purple);
}

.flow-actor.collaborator {
    background: rgba(96,165,250,0.12);
    color: var(--blue);
}

.flow-connector {
    width: 2px;
    height: 24px;
    background: var(--border-hover);
    margin: 0 auto;
}

/* ─── Permissions grid ─── */
.perm-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 48px;
}

.perm-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}

.perm-card:hover {
    border-color: var(--border-hover);
}

.perm-toggle {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    flex-shrink: 0;
    margin-top: 3px;
}

.perm-toggle.on {
    background: var(--green);
}

.perm-toggle.off {
    background: transparent;
    border: 2px solid var(--text-3);
}

.perm-info h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: var(--mono);
    color: var(--text-1);
    margin-bottom: 6px;
}

.perm-info p {
    font-size: 0.8125rem;
    color: var(--text-2);
    line-height: 1.55;
}

.perm-default {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    flex-shrink: 0;
}

.perm-default.off {
    color: var(--text-3);
}

/* ─── Scope diagram ─── */
.scope-diagram {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px;
}

.scope-layer {
    padding: 20px;
    border-radius: 6px;
}

.scope-layer.all {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
}

html.light .scope-layer.all {
    background: rgba(0,0,0,0.02);
}

.scope-layer.scoped {
    background: var(--accent-soft);
    border: 1px solid rgba(232,70,30,0.2);
}

.scope-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-3);
    margin-bottom: 12px;
}

.scope-teams {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.scope-team {
    padding: 8px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.04);
    color: var(--text-1);
}

html.light .scope-team {
    background: rgba(0,0,0,0.03);
}

.scope-team.dim {
    opacity: 0.35;
}

.scope-team.active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
}

.scope-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 0;
}

.scope-arrow span {
    font-size: 0.6875rem;
    font-weight: 600;
    font-family: var(--mono);
    color: var(--accent);
    padding: 4px 10px;
    background: var(--bg-elevated);
    border-radius: 4px;
    border: 1px dashed rgba(232,70,30,0.3);
}

/* ─── Auth tiers ─── */
.auth-tiers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.tier-card {
    padding: 28px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}

.tier-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-elevated);
}

.tier-card.accent {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.tier-level {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-3);
    margin-bottom: 12px;
}

.tier-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-1);
}

.tier-desc {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 16px;
}

.tier-use {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-3);
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

/* ─── Execution model ─── */
.exec-model {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 0;
    margin-top: 48px;
    align-items: stretch;
}

.exec-lane {
    padding: 28px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.exec-lane.human {
    background: rgba(96,165,250,0.04);
    border-color: rgba(96,165,250,0.15);
}

.exec-lane.agent {
    background: rgba(167,139,250,0.04);
    border-color: rgba(167,139,250,0.15);
}

.lane-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-2);
}

.exec-lane.human .lane-header { color: var(--blue); }
.exec-lane.agent .lane-header { color: var(--purple); }

.lane-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lane-action {
    padding: 10px 14px;
    font-size: 0.8125rem;
    color: var(--text-2);
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 6px;
}

html.light .lane-action {
    background: rgba(0,0,0,0.02);
    border-color: rgba(0,0,0,0.04);
}

.lane-action.highlight {
    font-weight: 600;
    color: var(--text-1);
    border-color: var(--border-hover);
    background: rgba(255,255,255,0.06);
}

html.light .lane-action.highlight {
    background: rgba(0,0,0,0.04);
}

.exec-divider {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    gap: 8px;
}

.divider-line {
    width: 1px;
    flex: 1;
    background: var(--border-hover);
}

.divider-label {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-3);
    writing-mode: vertical-lr;
    text-orientation: mixed;
    white-space: nowrap;
}

.exec-callout {
    margin-top: 32px;
    padding: 24px 28px;
    background: var(--accent-soft);
    border: 1px solid rgba(232,70,30,0.2);
    border-radius: 8px;
}

.exec-callout h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
}

.exec-callout p {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.65;
}

.exec-callout p strong {
    color: var(--text-1);
}

.exec-callout p a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ─── Federation architecture ─── */
.fed-arch {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-top: 48px;
    flex-wrap: wrap;
}

.fed-node {
    flex-shrink: 0;
}

.fed-device {
    padding: 20px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
    min-width: 160px;
}

.fed-device-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 4px;
}

.fed-device-detail {
    font-size: 0.75rem;
    font-family: var(--mono);
    color: var(--text-3);
}

.fed-shared {
    padding: 20px 24px;
    background: var(--accent-soft);
    border: 1px dashed rgba(232,70,30,0.3);
    border-radius: 8px;
    text-align: center;
    min-width: 180px;
}

.fed-shared-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 10px;
}

.fed-shared-items {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fed-shared-items span {
    font-size: 0.75rem;
    color: var(--text-2);
}

.fed-line {
    width: 60px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fed-line::before {
    content: '';
    width: 100%;
    height: 1px;
    background: var(--border-hover);
    position: absolute;
}

.fed-line-label {
    position: relative;
    z-index: 1;
    font-size: 0.5625rem;
    font-weight: 600;
    font-family: var(--mono);
    color: var(--text-3);
    background: var(--bg);
    padding: 2px 6px;
    white-space: nowrap;
    transform: rotate(-8deg);
}

html.light .fed-line-label {
    background: var(--bg);
}

.collab-block.alt .fed-line-label {
    background: var(--bg-surface);
}

/* ─── Federation features ─── */
.fed-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 48px;
}

.fed-card {
    padding: 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}

.fed-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-elevated);
}

.fed-card h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-1);
}

.fed-card p {
    font-size: 0.8125rem;
    color: var(--text-2);
    line-height: 1.6;
}

/* ─── Multi-team diagram ─── */
.multiteam-diagram {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px;
}

.mt-person {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: rgba(96,165,250,0.08);
    border: 1px solid rgba(96,165,250,0.15);
    border-radius: 8px;
    margin-bottom: 20px;
    color: var(--blue);
}

.mt-person span {
    font-size: 0.875rem;
    font-weight: 600;
}

.mt-branches {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-left: 20px;
}

.mt-branch {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mt-line {
    width: 20px;
    height: 1px;
    background: var(--border-hover);
    flex-shrink: 0;
}

.mt-team {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    flex: 1;
    background: rgba(255,255,255,0.02);
}

html.light .mt-team {
    background: rgba(0,0,0,0.02);
}

.mt-team-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
    display: block;
}

.mt-perms {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.mt-perm {
    font-size: 0.625rem;
    font-weight: 600;
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 2px 6px;
    border-radius: 3px;
}

.mt-perm.on {
    background: rgba(74,222,128,0.12);
    color: var(--green);
}

html.light .mt-perm.on {
    background: rgba(22,163,74,0.1);
}

.mt-perm.off {
    background: rgba(255,255,255,0.04);
    color: var(--text-3);
    text-decoration: line-through;
}

html.light .mt-perm.off {
    background: rgba(0,0,0,0.03);
}

/* ─── Difference grid ─── */
.diff-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 48px;
}

.diff-card {
    padding: 28px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}

.diff-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-elevated);
}

.diff-card h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-1);
}

.diff-card p {
    font-size: 0.8125rem;
    color: var(--text-2);
    line-height: 1.6;
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .sec-split {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .sec-split.reverse {
        direction: ltr;
    }

    .auth-tiers {
        grid-template-columns: 1fr;
    }

    .exec-model {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .exec-divider {
        flex-direction: row;
        padding: 8px 0;
    }

    .divider-label {
        writing-mode: horizontal-tb;
    }

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

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

@media (max-width: 768px) {
    .collab-hero { padding: 140px 24px 80px; }
    .collab-hero h1 { font-size: 2.25rem; }

    .collab-block { padding: 80px 24px; }

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

    .fed-arch {
        flex-direction: column;
        gap: 0;
    }

    .fed-line {
        width: 1px;
        height: 30px;
    }

    .fed-line::before {
        width: 1px;
        height: 100%;
    }

    .fed-line-label {
        transform: none;
    }

    .fed-features {
        grid-template-columns: 1fr;
    }

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