/* zStream shared components — lifted from admin's best-evolved versions.
   Page-specific layout stays in each page's local <style>. */

/* ---- Buttons ---- */
.btn {
    padding: 8px 16px;
    border: 1.5px solid var(--border);
    background: var(--surface);
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--text);
    cursor: pointer;
    white-space: nowrap;
    border-radius: var(--r-btn);
    transition: background var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out),
                color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out),
                transform var(--dur-fast) var(--ease-out);
}
.btn:hover { background: var(--surface2); border-color: var(--dim); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: var(--ring-accent); border-color: var(--accent); }
.btn:disabled { opacity: 0.4; cursor: default; transform: none; }

.btn-primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn-primary:hover { background: #ccc; border-color: #ccc; }

.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 15%, var(--surface)); border-color: var(--danger); }

.btn-ghost { background: none; border-color: transparent; }
.btn-ghost:hover { background: var(--surface2); border-color: transparent; }

.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 11px 20px; font-size: 13px; }
.btn-block { width: 100%; }

/* Square icon button — matches the viewer toolbar .tb-btn aesthetic.
   Use for chat send/attach, panel close, tile actions, etc. */
.btn-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; padding: 0;
    border: 1.5px solid var(--border);
    background: var(--surface2);
    color: var(--text);
    cursor: pointer;
    border-radius: var(--r-btn);
    transition: background var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out),
                color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out);
}
.btn-icon:hover { border-color: var(--dim); color: var(--text); }
.btn-icon:active { transform: translateY(1px); }
.btn-icon:focus-visible { outline: none; box-shadow: var(--ring-accent); border-color: var(--accent); }
.btn-icon:disabled { opacity: 0.4; cursor: default; transform: none; }
.btn-icon svg { width: 18px; height: 18px; }
.btn-icon.btn-icon-sm { width: 28px; height: 28px; border-radius: var(--r-md); }
.btn-icon.btn-icon-sm svg { width: 14px; height: 14px; }

.btn-tab {
    border: none; background: none; color: var(--dim);
    border-bottom: 2px solid transparent;
    padding: 6px 14px; font-size: 13px; border-radius: 0;
    transition: color var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out);
}
.btn-tab:hover { color: var(--text); }
.btn-tab.active { color: var(--text); border-bottom-color: var(--text); }
.btn-tab:focus-visible { outline: none; box-shadow: var(--ring-accent); }

/* ---- Forms ---- */
.form-row { margin-bottom: 18px; }
.form-row label {
    display: block;
    font-size: 11px; font-weight: 600; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--dim);
    margin-bottom: 6px;
}
.form-row input,
.form-row select,
.form-row textarea {
    width: 100%; padding: 9px 12px;
    border: 1px solid var(--border); background: var(--surface2);
    font: inherit; font-size: 13px; color: var(--text);
    outline: none; border-radius: var(--r-btn);
    transition: border-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out);
}
.form-row input:hover,
.form-row select:hover,
.form-row textarea:hover { border-color: var(--dim); }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus { border-color: var(--accent); box-shadow: var(--ring-accent); }
.form-row input::placeholder { color: var(--faint); }

/* Generic inputs outside .form-row — for places that use raw <input>, <select>, <textarea>. */
.input, .select, .textarea {
    padding: 9px 12px;
    border: 1px solid var(--border); background: var(--surface2);
    font: inherit; font-size: 13px; color: var(--text);
    outline: none; border-radius: var(--r-btn);
    transition: border-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out);
}
.input:hover, .select:hover, .textarea:hover { border-color: var(--dim); }
.input:focus, .select:focus, .textarea:focus { border-color: var(--accent); box-shadow: var(--ring-accent); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }

.form-row.checkbox { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.form-row.checkbox label {
    margin: 0; text-transform: none; letter-spacing: 0;
    font-size: 13px; font-weight: 400; color: var(--text);
}
.form-row.checkbox input { width: auto; }

/* ---- Centered card (landing / login / join / waiting) ---- */
.panel-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    padding: 48px;
    width: 400px;
    max-width: calc(100vw - 32px);
}

/* ---- Modal ---- */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    z-index: var(--z-modal);
}
.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    width: 600px; max-width: calc(100vw - 32px);
    max-height: calc(100vh - 64px);
    overflow-y: auto; padding: 36px;
}
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 28px;
}
.modal-title {
    font-size: 13px; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase;
}
.modal-footer {
    display: flex; justify-content: flex-end; gap: 8px;
    margin-top: 24px;
}

/* ---- Panel card (rounded inset card inside a side panel or tab content) ---- */
.panel-card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-3) var(--sp-4);
    transition: border-color var(--dur-fast) var(--ease-out),
                background var(--dur-fast) var(--ease-out);
}
.panel-card.interactive { cursor: pointer; }
.panel-card.interactive:hover { border-color: var(--dim); }

/* ---- Badges ---- */
.badge {
    display: inline-block; padding: 3px 9px;
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase;
    border-radius: var(--r-sm);
}
.badge-live    { background: #0d2211; color: var(--green); }
.badge-pending { background: #1a1a1a; color: var(--dim); }
.badge-ended   { background: #2a1515; color: var(--danger); }
.badge-webrtc  { background: #111828; color: #6688ee; }
.badge-llhls   { background: #1f1a0a; color: #ccaa33; }
.badge-source  { background: #0d2211; color: var(--green); }

/* ---- Toast ---- */
#toast {
    position: fixed; bottom: 24px; left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--text); color: var(--bg);
    padding: 10px 20px; border-radius: var(--r-lg);
    font-size: 13px; z-index: var(--z-toast);
    opacity: 0; transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
}
#toast.show {
    opacity: 1; transform: translateX(-50%) translateY(0);
}

/* ---- Section header ---- */
.section-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 20px;
}
.section-title {
    font-size: 11px; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--dim);
}

/* ---- Empty state ---- */
.empty {
    padding: 48px; text-align: center;
    color: var(--dim); font-size: 13px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-lg);
}