/* ============================================================
   Agent V2 — Base Layout
   Shell structure, resize handle, expand/collapse, scroll.
   Depends on: agent-v2-tokens.css, theme.css
   ============================================================ */

/* ── Workspace Shell ────────────────────────────────────────── */
.agent-workspace {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    min-width: 250px;
    position: relative;
    background: var(--agent-surface);
    backdrop-filter: var(--card-backdrop-blur);
    -webkit-backdrop-filter: var(--card-backdrop-blur);
    border-right: 1px solid var(--agent-border);
    box-shadow: var(--card-shadow);
    transition: width var(--duration-expand) var(--ease-out-expo);
    overflow: hidden;
    contain: layout style;
    font-family: var(--font-body);
}

.agent-workspace--expanded {
    min-width: 420px;
}

/* ── Resize Handle ──────────────────────────────────────────── */
.agent-resize-handle {
    position: absolute;
    top: 0;
    right: -2px;
    width: 5px;
    height: 100%;
    cursor: col-resize;
    z-index: 10;
    background: transparent;
    transition: background var(--duration-fast) ease;
}

.agent-resize-handle:hover,
.agent-resize-handle:active {
    background: var(--md-sys-color-primary);
    opacity: 0.4;
}

/* ── Header ─────────────────────────────────────────────────── */
.agent-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--md-sys-spacing-2) var(--md-sys-spacing-4);
    min-height: 40px;
    border-bottom: 1px solid var(--agent-border);
    background: var(--agent-surface-elevated);
    backdrop-filter: var(--card-backdrop-blur);
    flex-shrink: 0;
    gap: var(--md-sys-spacing-3);
    user-select: none;
}

.agent-header__left {
    display: flex;
    align-items: center;
    gap: var(--md-sys-spacing-3);
    min-width: 0;
    flex: 1;
}

.agent-header__right {
    display: flex;
    align-items: center;
    gap: var(--md-sys-spacing-2);
    flex-shrink: 0;
}

/* Agent Avatar */
.agent-avatar {
    position: relative;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 240, 255, 0.1);
    border: 1.5px solid var(--md-sys-color-primary);
    flex-shrink: 0;
}

.agent-avatar__pulse {
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 1.5px solid var(--md-sys-color-primary);
    animation: agent-pulse 2s ease-in-out infinite;
    pointer-events: none;
}

@keyframes agent-pulse {
    0%, 100% { opacity: 0; transform: scale(1); }
    50%      { opacity: 0.4; transform: scale(1.15); }
}

.agent-avatar__icon {
    width: 16px;
    height: 16px;
    fill: var(--md-sys-color-primary);
}

/* Agent Identity */
.agent-identity {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.agent-identity__name {
    font-size: var(--md-sys-typescale-body-large);
    font-weight: 600;
    color: var(--md-sys-color-on-surface-strong);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-identity__subtitle {
    font-size: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    white-space: nowrap;
}

/* Header Badges */
.agent-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: var(--md-sys-typescale-body-small);
    font-weight: 500;
    white-space: nowrap;
    font-feature-settings: 'tnum';
}

.agent-badge--model {
    background: var(--metrics-badge-bg);
    color: var(--metrics-badge-text);
    border: 1px solid rgba(0, 240, 255, 0.15);
}

.agent-badge--status {
    background: rgba(80, 250, 123, 0.1);
    color: var(--status-success);
    border: 1px solid rgba(80, 250, 123, 0.15);
}

/* Header Action Buttons */
.agent-header-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border: none;
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    border-radius: var(--md-sys-shape-corner-extra-small);
    cursor: pointer;
    transition: all var(--duration-fast) ease;
    padding: 0;
}

.agent-header-btn:hover {
    background: var(--md-sys-color-surface-hover);
    color: var(--md-sys-color-on-surface);
}

.agent-header-btn:active {
    background: var(--md-sys-color-surface-active);
}

.agent-header-btn svg {
    width: 16px;
    height: 16px;
}

/* ── Body / Scroll Area ─────────────────────────────────────── */
.agent-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-gutter: stable;
    overscroll-behavior: contain;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Soft-edge fade on top and bottom scroll edges */
.agent-body--fade-top {
    -webkit-mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        black 24px,
        black 100%
    );
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        black 24px,
        black 100%
    );
}

.agent-body--fade-bottom {
    -webkit-mask-image: linear-gradient(
        to bottom,
        black 0%,
        black calc(100% - 24px),
        transparent 100%
    );
    mask-image: linear-gradient(
        to bottom,
        black 0%,
        black calc(100% - 24px),
        transparent 100%
    );
}

.agent-body--fade-both {
    -webkit-mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        black 24px,
        black calc(100% - 24px),
        transparent 100%
    );
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        black 24px,
        black calc(100% - 24px),
        transparent 100%
    );
}

/* Scroll-to-bottom FAB */
.agent-scroll-fab {
    position: sticky;
    bottom: 8px;
    align-self: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--agent-border);
    background: var(--agent-surface-elevated);
    backdrop-filter: var(--card-backdrop-blur);
    color: var(--md-sys-color-on-surface);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all var(--duration-fast) ease;
    z-index: 5;
}

.agent-scroll-fab:hover {
    background: var(--md-sys-color-surface-hover);
    border-color: var(--md-sys-color-primary);
    box-shadow: 0 0 12px var(--agent-glow);
}

.agent-scroll-fab--visible {
    display: flex;
    animation: fadeSlideUp var(--duration-normal) var(--ease-out-spring);
}

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Footer / Input Area ────────────────────────────────────── */
.agent-footer {
    flex-shrink: 0;
    border-top: 1px solid var(--agent-border);
    background: var(--agent-surface-elevated);
    backdrop-filter: var(--card-backdrop-blur);
    padding: var(--md-sys-spacing-3);
    display: flex;
    flex-direction: column;
    gap: var(--md-sys-spacing-2);
}

/* ── View Tabs (Chat / Timeline / Agents) ───────────────────── */
.agent-view-tabs {
    display: flex;
    gap: 2px;
    padding: 2px;
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-small);
    border: 1px solid var(--agent-border-subtle);
}

.agent-view-tab {
    flex: 1;
    padding: 6px 8px;
    border: none;
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    font-family: var(--font-heading);
    font-size: var(--md-sys-typescale-body-small);
    font-weight: 600;
    letter-spacing: 0.2px;
    cursor: pointer;
    border-radius: calc(var(--md-sys-shape-corner-small) - 2px);
    transition: all var(--duration-fast) var(--ease-out-spring);
    white-space: nowrap;
    text-align: center;
    user-select: none;
}

.agent-view-tab:hover {
    color: var(--md-sys-color-on-surface);
    background: var(--agent-surface-hover);
    transform: translateY(-0.5px);
}

.agent-view-tab--active {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    font-weight: 700;
    box-shadow: 0 2px 10px var(--agent-glow);
}

.agent-view-tab--active:hover {
    background: var(--md-sys-color-primary-hover);
    color: var(--md-sys-color-on-primary);
    box-shadow: 0 4px 14px var(--agent-glow);
    transform: none;
}

/* ── Metrics Panel ──────────────────────────────────────────── */
.agent-metrics {
    display: none;
    padding: var(--md-sys-spacing-3) var(--md-sys-spacing-4);
    border-bottom: 1px solid var(--agent-border);
    background: var(--agent-surface);
    gap: var(--md-sys-spacing-3);
    flex-direction: column;
    animation: slideDown var(--duration-normal) var(--ease-out-spring);
}

.agent-metrics--visible {
    display: flex;
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; }
    to   { opacity: 1; max-height: 200px; }
}

.agent-metrics__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--md-sys-spacing-2);
}

.agent-metric {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--md-sys-spacing-2);
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-extra-small);
    border: 1px solid var(--agent-border-subtle);
}

.agent-metric__label {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--md-sys-color-on-surface-variant);
}

.agent-metric__value {
    font-size: var(--md-sys-typescale-body-large);
    font-weight: 600;
    font-feature-settings: 'tnum';
    color: var(--md-sys-color-on-surface-strong);
}

/* ── Gating Overlay (Free tier lock) ────────────────────────── */
.agent-gating {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--md-sys-spacing-4);
    background: rgba(15, 16, 17, 0.92);
    backdrop-filter: blur(8px);
    text-align: center;
    padding: var(--md-sys-spacing-5);
}

.agent-gating__icon {
    font-size: 32px;
    opacity: 0.6;
}

.agent-gating__title {
    font-size: var(--md-sys-typescale-title-small);
    font-weight: 600;
    color: var(--md-sys-color-on-surface-strong);
}

.agent-gating__desc {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    max-width: 220px;
    line-height: 1.5;
}

.agent-gating__btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: none;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
    color: #000;
    font-weight: 600;
    font-size: var(--md-sys-typescale-body-large);
    cursor: pointer;
    transition: transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.agent-gating__btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
}

/* ── Utility Classes ────────────────────────────────────────── */
.agent-hidden { display: none !important; }
.agent-fade-in {
    animation: agentFadeIn var(--duration-normal) var(--ease-out-spring);
}

@keyframes agentFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

body.resizing .agent-workspace {
    transition: none !important;
}

@media (prefers-reduced-motion: reduce) {
    .agent-avatar__pulse { animation: none; }
    .agent-fade-in { animation: none; }
    .agent-scroll-fab--visible { animation: none; }
    .agent-metrics { animation: none; }
    .agent-workspace { transition: none; }
}