redesign(public): session detail as hero-overlay composition, NowPlaying-themed

DeepDrftPublic.Client/Pages/SessionDetail.razor.css

@@ -1,24 +1,174 @@
-/* Hero-dominant: a wide 16:9 image rather than the square cover used on track detail. */
-.session-detail-hero {
-    margin: 0 auto 2rem;
-    overflow: hidden;
+/* Session detail is hero-dominant: a large background image with the detail components overlaid
+   directly on top, themed to match the NowPlaying glassmorphic family. The page widens to the
+   Large container (set in markup) rather than the shared 760px detail column. */
+
+.session-detail-page {
+    padding-top: 2rem;
+    padding-bottom: 4rem;
 }
 
-/* session-detail-hero-img rides on MudPaper (child Razor component); ::deep pierces its output. */
-::deep .session-detail-hero-img {
+/* Positioning context for every overlay. A tall, dominant frame rather than the 16:9 strip. */
+.session-hero {
+    position: relative;
     width: 100%;
-    aspect-ratio: 16 / 9;
+    aspect-ratio: 16 / 10;
+    max-height: 70vh;
+    min-height: 420px;
+    margin-top: 1rem;
+    overflow: hidden;
+    border-radius: 8px;
+    box-shadow: 0 12px 40px color-mix(in srgb, var(--mud-palette-text-secondary) 22%, transparent);
+}
+
+/* session-hero-img / session-hero-placeholder ride on MudPaper (child Razor component);
+   the class lands on MudPaper's native .mud-paper output, so ::deep pierces the component boundary. */
+::deep .session-hero-img {
+    position: absolute;
+    inset: 0;
     background-size: cover;
     background-position: center;
     background-repeat: no-repeat;
 }
 
-/* Secondary medium square cover sitting below the hero — same 220px frame as mix detail,
-   smaller than the cut cover so the hero stays dominant. The cover-art MudPaper fills it. */
-.session-detail-cover {
-    aspect-ratio: 1 / 1;
-    max-width: 220px;
-    margin: 0 auto 2rem;
-    overflow: hidden;
-    box-shadow: 0 8px 28px color-mix(in srgb, var(--mud-palette-text-secondary) 18%, transparent);
+::deep .session-hero-placeholder {
+    position: absolute;
+    inset: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background-color: var(--mud-palette-surface);
+}
+
+::deep .session-hero-placeholder .mud-icon-root {
+    font-size: 120px;
+}
+
+/* Darkening gradient shim: stronger at the bottom (under the title/play row) and lighter toward
+   the middle, with a top darken so the genre/share overlay stays legible too. */
+.session-hero-shim {
+    position: absolute;
+    inset: 0;
+    pointer-events: none;
+    background:
+        linear-gradient(to bottom,
+            rgba(0, 0, 0, 0.55) 0%,
+            rgba(0, 0, 0, 0.15) 28%,
+            rgba(0, 0, 0, 0.15) 55%,
+            rgba(0, 0, 0, 0.75) 100%);
+}
+
+/* --- Top overlay: genre / date / share --- */
+.session-hero-top {
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    z-index: 2;
+    display: flex;
+    align-items: flex-start;
+    justify-content: space-between;
+    gap: 1rem;
+    padding: 1.25rem 1.5rem;
+}
+
+.session-overlay-date {
+    display: flex;
+    flex-direction: column;
+    gap: 0.1rem;
+}
+
+.session-overlay-label {
+    font-family: var(--deepdrft-font-mono);
+    font-size: 0.6rem;
+    letter-spacing: 0.25em;
+    text-transform: uppercase;
+    color: var(--deepdrft-green-accent);
+}
+
+.session-overlay-value {
+    font-family: var(--deepdrft-font-body);
+    font-size: 0.8rem;
+    color: var(--deepdrft-white);
+}
+
+/* Genre chip themed to the glassmorphic NowPlaying surface. The class lands on MudChip's native
+   .mud-chip output, so ::deep is required to reach it. */
+::deep .session-overlay-chip.mud-chip {
+    background: rgba(250, 250, 248, 0.06);
+    border: 1px solid rgba(250, 250, 248, 0.12);
+    backdrop-filter: blur(8px);
+    color: var(--deepdrft-white);
+    font-family: var(--deepdrft-font-mono);
+    letter-spacing: 0.12em;
+}
+
+/* --- Bottom overlay: cover thumb / title / play --- */
+.session-hero-bottom {
+    position: absolute;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    z-index: 2;
+    padding: 1.5rem;
+}
+
+.session-cover-thumb {
+    flex: 0 0 auto;
+    width: 96px;
+    height: 96px;
+    overflow: hidden;
+    border: 1px solid rgba(250, 250, 248, 0.12);
+    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
+}
+
+.session-hero-titles {
+    flex: 1 1 auto;
+    min-width: 0;
+}
+
+.session-overlay-title {
+    font-family: var(--deepdrft-font-display);
+    font-size: clamp(1.75rem, 4vw, 2.75rem);
+    font-weight: 400;
+    line-height: 1.1;
+    color: var(--deepdrft-white);
+    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
+}
+
+.session-overlay-artist {
+    font-family: var(--deepdrft-font-body);
+    font-size: 0.85rem;
+    letter-spacing: 0.08em;
+    color: rgba(250, 250, 248, 0.7);
+    margin-top: 0.35rem;
+}
+
+.session-hero-play {
+    flex: 0 0 auto;
+}
+
+/* The play affordance and share button sit over a dark image — force their icon glyphs to the
+   light theme color regardless of MudBlazor's Secondary palette. Both PlayStateIcon and
+   SharePopover render MudIconButton / MudProgressCircular internals, so ::deep is required. */
+::deep .session-hero-play .mud-icon-button,
+::deep .session-hero-play .mud-progress-circular,
+::deep .session-hero-share .mud-icon-button {
+    color: var(--deepdrft-white);
+}
+
+@media (max-width: 599.98px) {
+    .session-hero {
+        aspect-ratio: 3 / 4;
+        min-height: 380px;
+    }
+
+    /* session-hero-bottom-row rides on MudStack's native output div, so ::deep is required. */
+    ::deep .session-hero-bottom-row {
+        flex-wrap: wrap;
+    }
+
+    .session-cover-thumb {
+        width: 72px;
+        height: 72px;
+    }
 }