/* === Ethereal Glass 复制按钮 === */
.copy-btn {
    position: absolute;
    top: var(--space-4, 16px);
    right: var(--space-4, 16px);
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.02);
    color: var(--color-text-tertiary, rgba(255,255,255,0.35));
    border: 0.5px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-full, 9999px);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    opacity: 0;
    transform: scale(0.9);
    z-index: 1;
}

.broadcast:hover .copy-btn {
    opacity: 1;
    transform: scale(1);
}

.copy-btn:hover {
    background: rgba(106, 130, 251, 0.1);
    border-color: rgba(106, 130, 251, 0.15);
    color: var(--color-primary-light, #8ba3ff);
    transform: scale(1.1);
}

.copy-btn:active {
    transform: scale(0.95);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 1.5;
}

/* === 复制成功 === */
.copy-btn.copied {
    background: rgba(100, 221, 142, 0.08);
    border-color: rgba(100, 221, 142, 0.15);
    color: #64dd8e;
}

/* === Toast 通知 === */
.copy-toast {
    position: fixed;
    bottom: var(--space-6, 24px);
    left: 50%;
    transform: translateX(-50%) translateY(16px);
    padding: var(--space-3, 12px) var(--space-5, 20px);
    background: rgba(5, 5, 5, 0.8);
    color: var(--color-text, rgba(255,255,255,0.85));
    border: 0.5px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-full, 9999px);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: var(--text-sm, 0.875rem);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.32, 0.72, 0, 1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
}

.copy-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.copy-toast svg {
    width: 16px;
    height: 16px;
    stroke-width: 1.5;
}

/* === 浅色主题 === */
.light-theme .copy-btn {
    color: rgba(0, 0, 0, 0.35);
    border-color: rgba(0, 0, 0, 0.04);
}

.light-theme .copy-toast {
    background: rgba(255, 255, 255, 0.8);
    color: rgba(0, 0, 0, 0.85);
    border-color: rgba(0, 0, 0, 0.06);
}

.light-theme .copy-btn:hover {
    background: rgba(106, 130, 251, 0.08);
    border-color: rgba(106, 130, 251, 0.1);
}